If you are flying luftwaffe rides, taking off into the trees is quite realistic - especially if you are flying LW arenas.
In early '45, JG26 had a base that was literally inside a pine forest - they had to do this to be able to hide their rides from the allied jabos. They would land in a clearing and have their rides pushed under trees to hide them while they were refueled and rearmed. Takeoffs were just as hairy, as you had to get up and over the trees with a load of fuel & ordnance, and any engine troubles meant that you were going to be kissing the trees.
EagleDNY
"Hangers? Hangers? We don't need no stinking hangers..."