I usually see them approach the roost tree from the upper side and fly in. You can sometimes catch them jumping to higher limbs even up to the uppermost parts of the trees. They usually like more open, level tree branches .... but I've seen and heard them breaking thru thicker "brushed" limbs (Little Buck got his color back about 1/2 hour after they flew into the tree he was sitting against).
They do fly out in any direction, but usually into an opening large enough they can look for possible predators before flying out, and feel that they can either run or fly away if jumped.
