When you drop your trailer, do you play in the mud? DRW are no darn good in the mud. You cannot drop into the ruts from SRW vehicles, and if you climb out then most likely you will bump the trees because of the distance you have to offset.
Then when you get back to the hard roads, you need to check for rocks between the duals. Ever see fenders with holes from the inside? Prying rocks out of dual wheels, with fenders, is a dirty job with plenty of cussing.
Just a thought for those of us who play in the mud. Now if the wife would go for a truck camper, I could bring the 48 CJ2A and the truck could sport dual wheels.