Quote Originally Posted by DonnaR57 View Post
...how crammed the other vehicle is. When we moved our kids to Colorado (out of San Diego), there were 4 in their vehicle and no room for any more because they had stuff in there. They crammed their U-Haul truck and the vehicle on the auto transport, to FULL. You don't want to move the towed vehicle off the AT en route, because it's not easy (and very time-consuming) to get it securely back on that trailer. We were lucky that there was a restaurant with truck parking, but not close enough to walk, that wasn't a Denny's or truck stop.
This post said driving both vehicles, thus neither is on any kind of tow vehicle like you mention.

All we don't know is if one (or both) vehicles have something to pull, but it seems if there was just one item being towed the truck would be the more likely candidate.

Alternatively, use the back seat (or part of it) of the other to put luggage in (that would be taken out at the lodging stop, thus making room for a 3rd person in the back to go somewhere if needed for dinner or whatever).