TT Wear on one tire..only took few short trips

It could be one, or more than one, of several issues.
Your on the road so drop by a truck tire dealer with the camper. I've found they know more about tire wear issues on trailers than a rv dealer or car tire dealer down on the corner.
If its just a bad tire or loose bearing or loose wheel lugs... they can fix those issue.

If a bent axle a big rig trailer repair shop can bend the axle back to specs quickly and get you on your way.