Thanks for all the comments and suggestions. Looking at the tires again this morning I see that the wear is not even around the tire. Some parts of the tire has tread that is fine. Just the way the trailer is sitting now the worn tread is up and visible. If the tires were turned 90 degrees the heavy wear would not be visible.
So I'm suspecting failure of the tires since being out of camber or alignment should cause wear all the way around the tire.
Still need to get it checked and decide on which tires to get from what is available.