I am bringing my laptop anyhow, and ssh is installed.
Attendees are welcome to use it!
It will also have a 4G mobile broadband connection

OK, I can clearly see some topics for the meeting; what about catering and bedding?
Maemish?
IIRC, you said sheets are not included - does that mean there's actual beds & blankets for under 10 people? Would be good to know if I don't have to bring mattress and sleeping bag.

Food:
I liked your suggestion of salads and chicken; but I have nothing against barbeque either.

Drink:
Finnish tradition of everybody brings their own alcoholic beverages (and hangs on to them for dear life)? I would prefer to have at least some beer for everybody, maybe some wine too.

Shall we share the burden of bringing the food?
Of course we probably still need to share some expenses, for me that goes without saying.