[JeepNmpg2]

The tow dolley has the advantage of less weight by about half as much as the full carrier, and there is no real difference in the PULL aspect of operating either trailer. However the real pain lies if you ever have to back the tow dolley up because it allows the front axle of your car to pivot kind of like a "radio flyer" era wagon, thus you are essentially towing two very short trailers in a doubles configuration. I did some more research, and found that penske uses a medium grade car carrier that isn't as heavy as uhaul's but only supports up to around 4,100 lbs so hauling a minivan or larger vehicle wouldn't be practical. Sounds like you've got a good combination going for yourself.