We have operated our rig (see signature) for 90,000 miles, pretty much everywhere, from Alaska to the Keys. We have no need for a dually.
We operate frequently on the beach at Assateague Island, Maryland, where DRW's are banned. With two sets of tires, 19.5" "H" rated Rickson Truck wheels and tires for highway use and a set of 16" Nitto Dune Grapplers for over sand use, we have been very pleased. Rancho adjustable shocks along with air bags and larger bump stops, have been very helpful.
We like the outback locations, off-road, and find that SRW is more comfortable and economical for us.
