Go in flat between big trees. That's what we were told on Borneo and one of ours that went in in Malaya did just that. Tail first means that the helicopter will be going backwards into the timber and the first obstruction is going to tip the tail up and give you a good view of the ground. When you are flat you have some idea where to put the tail.
There is an awful lot of energy used up by the main rotor as it beats itself to death whilst you are falling through the branches so you only really drop the last few feet. The aircraft structure is strong enough to save you then.