OK, camping and beer, yes, fishing no problem, mosquitos - sure no sweat, ours in Florida are the size of bats, but the gay sex thing is all yours.
As far as the drowning goes, you'd better pack a lunch. I might be one god awful swimmer, but I've got a really nasty grip and a great appreciation for physical cruelty once I get pissed off.
Can I piss in the lake or is that forbidden in Finland???