I went with a 4 down tow. The reason (or my way of thinking) is that with a larger coach (1st was a Thor 34H, current is a 40 footer) that there are many CG's where I have to drop the tow'd at the CG entrance just to get around the CG and get parked.
A dolly/trailer setup would be a real hassle (unload toad,unhook dolly and hook dolly to toad, drag to campsite,unhook dolly from toad & store all. And have do repeat in reverse sequence to leave park/CG...
SOB (some other brand)