RE: stuck in tree
Don't worry about people making fun of you... it happens to a lot of us...damn tree still has half of one my wings![:@]. Our club has business cards for tree trimming services in the shed and one member who works for the electric company has been up more trees than he cares to count!
As for whether you airplane will be OK..... tough to tell...try asking/searching in the boating or seaplane forums what they do for waterlogged electronics.
Good luck!