As a really bad R/C helicopter (Blade CP, couple of tiny toys) pilot of a couple of years now... I can't imagine doing this, just for fun. The Blade is hard as hell to keep under control, and kind of dangerous.I haven't had a major crash, but on my 4th set of main rotor blades, second tail. I power down quickly before impact to minimize damage. I'd think you would want to have a couple of backups.
There is a forum RCuniverse, or something like that. Helped me get off the ground. Haven't been there in over a year, but the have most anything RC. Should give it a look, ask there. More likely to get info, but suspect they'll think it a waste of good helicopters...