All my years playing paintball and airsoft you don't want to be in a tree. One shot goes off then you're a sitting duck. The only way it would work for a tree is if you had a sniper rifle and the target was 50 to 60 yards away and no one else is around.

I like to make the game fun by using firecrackers, smoke bombs and snaps. Also most of the time it's 2 vs 1 so it's nice to have some backup. My main rifle is a spring action MP5 that I have to recoc every shot and I have a Co2 power pistol as my side arm that I use when im close enough to the target.
To live is to let die