One big limitation of DRW is the forced choice between a regular cab and a crew cab. I wanted the shorter cab as with the mega/double/super cab as the rear area is very useful for storing things I want to get to quickly without going into the camper or for things I can't put into the camper like an outboard motor or a trolling motor or fishing gear or a cooler.
I would go with SRW and 19.5 rims and tires if I needed the additional load capacity. DRW is not an option as the extra width and longer wheelbase makes these trucks a pain to drive and a pain to park and terrible for off pavement use.