I would recommend having a 2+ by 2+ with 3 door frames high and a small dino gate on one side. Remember the ramps. This will help make it a lot easier. If you build a wall around the pem then the animal should be safe.
Bola them first and tranq dart them, anything above lvl 35 will take more than 1 bola lvl 95 and up is going to a struggle if you’ve just spawned in, but great travel mount and great in combat just pump health and melee, stam doesn’t drop that much, similar to a thyla