One thing I want to throw into the mix is how much cooler my LT tires are compared to the ST's I've run in the past when doing several hours of highway driving.
That and the trailer does not seem to want to follow the ruts in the road nearly as much.
I'm extremely happy with my LT215/75R16 BFG Commercial T/A 2 tires, 2680lb rating is ideal for a unit like mine with a 10400lb GVWR (but the axles are 5000lb axles as per the tags on them?)