Mmmm,

If it rains in the meantime, just leave it there. Usually the servos will work and the RX will likely 'work' just fine, but I wouldn't risk a new plane on old crashed equipment if it had gotten really wet.

I am assuming it's a trainer with 4 cheap servos, a 4-6 channel FM receiver and like a 700 MaH pack....like $130 worth of stuff.

Also, a thin rope with a weight on one end is perhaps the best way to get to the branches supporting the plane. Once the thin rope is in place, get the weighted end to come back down . Then you can pull larger ropes up or tie sticks to the rope and pull them through to try and dislodge the plane.

There is always the chainsaw option...it is perhaps the most fun and in a year you will have firewood. Use the plane for kindling.