Yall are making this too difficult. Wait until a high level gets stuck in some trees. Quicly put a dino gate behind it, then one in front. Back up, tranq it. Take crystals, go out of agro range. Come back, ot should be awake and still trapped. Go up to it and feed it. Just did a level 130 that way, ended up a 194 even using a few basic crystals. First one I've tamed.