For what it's worth. I know the majority prefer LT tires. I just went out and checked my G114 Goodyears on my new DRV Mobile Suite and the don't say LT or ST but stamped in sidewall trailer use only. I think my G614 on our Montana said ST .
The point I would like to make now is a friend of mine and one other person he new experienced a new wrinkle. The tire shops refused to sell and install LT tires for a trailer. The friends trailer was a utility trailer. The tire shops said the sidewalls were not strong enough on LT tires. We live in Ontario Canada. Our Ministers of Transport over here are pretty severe on vehicle safety issues. It might be worth checking with your DOT before spending money and being disappointed.