We just got back from a 400 mile trip with the new 15" wheels and Load D Bias tires. I had them balanced when I bought them. The trailer rode very well on the highway and handled nicely. I also drove a few miles on the sand. Some of it up into sand dunes towing the trailer. It worked better than I thought it would. The trick is letting at least half the air out of all the tires. I did need 4 Low to do it. Without the trailer I can drive most areas in 2wd and only need 4wd for the steep hills.
It was nice to be able to take a shower and not use the heavily ladden chemical toilets on the beach.
