These are easy without a tent. I've tamed a few dozen on Ragnarok at Viking Bay. Feed them and track it; they don't seem to wander to far. I've gotten to where I can track four at a time.
I just remove everything from my inventory except the spoiled meat and start feeding and running after them. If you time it right you can feed them before they land/take off and run to another one. They touch down twice before landing and leave a cloud of dust every take-off/landing.
Also, they can get into a regular doorway pretty easily. I learned that the hard way running for my life.
Vultures are the best against raider my base was getting raided omve the attackers got in my sun blocking flock of 57 vutures killed not only the raiders but there rex and two argys had the laugh of my life