I should have known the satnav was up to no good the moment it tried to send me through a field of very unimpressed Holstein cows. There I was, crawling along a farm track in my slightly-too-large hire car, convinced I was pioneering some secret route to Feriendorf Wardersee that Google Maps had only just discovered. Turns out I'd simply punched in the wrong postcode after a greasy breakfast at a motorway services near Hamburg. Classic me. Forty minutes of apologising to livestock later, I finally found the proper road and rolled up to the holiday park with what I can only describe as agricultural dignity.

The first person to spot my arrival was Dieter, who was walking a dachshund with the self-important waddle of a creature who absolutely knows it owns the place. Dieter himself had the weathered look of a man who'd spent forty summers watching British families reverse badly into parking spaces. He didn't even flinch at my mud-splattered car. "You took the scenic route," he said, which was either genuine local knowledge or the most polite way anyone's ever called me an idiot. We got chatting, as you do when you're standing in a car park feeling slightly foolish. He'd retired from something involving ships in Kiel and now devoted himself to what he called "supervising the lake." This mainly seemed to involve sitting on a particular bench with a thermos and making mental notes about everyone else's business.

The check-in process introduced me to Birgit, who ran the reception with the cheerful efficiency of someone who'd long ago accepted that holidaymakers arrive in only two states: utterly frazzled or suspiciously over-prepared. I was firmly in the first category. She handed over my keys with the kind of sympathetic smile that suggested she'd seen my type before. "The lake is warm this week," she offered, as if this were classified information. "Dieter will tell you otherwise, but he hasn't swum since 1987." This was delivered at normal volume with Dieter still visible through the window, now engaged in what appeared to be a heated negotiation with his own dog about walking pace.

My cottage sat among neat rows of similar wooden buildings, all very tidy and Nordic-looking, with a little terrace that faced towards Wardersee itself. I dumped my bags with the enthusiasm of a man who'd been driving for six hours and promptly discovered that I'd packed approximately seventeen phone chargers but no actual teabags. This would become relevant later.

That evening, having failed to locate a decent cuppa, I wandered down to the little shop near reception. There I encountered Klaus, who was restocking the beer fridge with the meditative patience of a man who understood that this was his true calling in life. He took one look at my desperate expression and asked, "British?" with the resigned air of someone about to perform a public service. Five minutes later I was walking away with a box of something he swore was "basically the same" and a bag of local biscuits he'd thrown in because, and I quote, "you look like you need them." He wasn't wrong.

By day two I'd settled into a rhythm of morning coffees on my terrace, watching the lake mist lift while various locals conducted their patrols. Dieter and his dachshund passed at precisely eight-thirty. Birgit appeared at nine to water the hanging baskets with military precision. Klaus opened the shop at ten, always with a slight wince, as if mornings remained personally offensive to him. I started to feel less like a holidaymaker and more like an unqualified observer of a very small, very peaceful kingdom.

It was on the Wednesday that I properly embarrassed myself. I'd decided to try the lake, having been assured by Birgit that Dieter's warnings about hypothermia were "mostly theatrical." I waded in with the cautious enthusiasm of a man who'd once been stung by a jellyfish in Cornwall and never quite recovered. The water was, in fact, perfectly pleasant. What I hadn't anticipated was the fishing boat that rounded the point, containing two men who'd clearly been at this since dawn. They watched my tentative doggy-paddle with the expression of professionals observing an amateur. One of them, who introduced himself later as Uwe, shouted something in German that I chose to interpret as encouragement. Klaus later translated it as "your technique resembles a distressed seal," which I felt was unnecessarily specific.

Uwe and his companion Jorgen became regular features of my stay. They'd been fishing Wardersee since they were boys, back when this area was all farmland and the holiday park was just a madman's dream. They told me this while I sat on their boat one morning, having accepted an invitation that I suspect was partly pity and partly entertainment value. Jorgen spoke almost no English but communicated volumes through expressive shrugs and the occasional meaningful gesture towards his sandwiches. Uwe did the translating, though he frequently improved upon the original for comic effect. "He says you hold the rod like a man who has never held anything before," was one gem. Jorgen's actual comment, I later learned, had been about the weather.

The thing about staying somewhere like Feriendorf Wardersee is that you arrive thinking you're booking accommodation, but what you're actually getting is temporary citizenship in a very particular community. Dieter never did approve of my swimming, but he started saving his bench's other half for me in the afternoons. Birgit left an actual box of proper teabags in my cottage on the Thursday, sourced from goodness-knows-where. Klaus taught me the German word for "hangover" after I made the mistake of trying to match Uwe's beer consumption one evening. Even Jorgen eventually nodded at my fishing technique, which by then had improved to merely "confused heron" standard.

On my final morning I packed with the sluggish reluctance of someone who'd accidentally found exactly what they needed. The satnav sat waiting, already plotting fresh agricultural disasters. Dieter appeared at my car window, the dachshund snuffling at his heels, and pressed a small packet of local smoked fish into my hands. "For the journey," he said. "Don't trust the motorways." Birgit waved from reception. Klaus was still asleep, but he'd left a note on the shop door saying "Back soon, don't panic." I never did find out if that was meant for me specifically or just the world in general.

As I finally pulled onto the proper road, mud-free and slightly more competent, I caught myself grinning like an idiot in the rear-view mirror. I'd come to Schleswig-Holstein for a quiet week by a lake and somehow acquired a cast of characters I hadn't known I needed. The satnav promptly tried to send me down another farm track, and for one mad moment I actually considered it.