Refueled? Really? That's not happening at KIT and the 'cleaning' will consist of the single FA just checking everything is in place (seats and shades up, seatbelts neatly folded, safety cards in place) and removing any obvious rubbish.

Here's how it probably happens: Pax de-plane and walk 20M to the terminal, pilots do paperwork while FA tidies. Then all three of them will pop behind the terminal for a quick cigarette. When the crew are ready, the new pax. will walk across from the terminal and board. IT SHOULD be do-able and the best thing is probably to have a word with the FA or one of the ground crew on disembarking the aircraft so they can look out for you. The same couple of people will be dealing with everything. It goes without saying that OLCI is a must. I doubt security will be closed. Here it's just a local police who works the machine and he/she can't leave the airport until the flight departs in any case.

That's how it's always worked for me at these small, single-flight turboprop airports but I haven't been to KIT. It for sure was like that at the old Paros airport and at Naxos - being Greece the cigarette was seemingly mandatory.