How long is the hoist cable?
How high were the trees?
In a Huey -1H, with a 275' cable, I never got close to a tree strike, but in the B model with 90' cable, there were plenty of times that I came awfully close. In a B206 with 90', I did come home with green tips once, but engineers checked and some polish was all that was needed. Thank you Mr Bell.