The RV "Toad"
A "toad" is a second vehicle that is towed behind a motorhome. This provides a convenient runabout vehicle for shopping or sightseeing, while leaving the motorhome at the RV park.
Towing 4 down
This term refers to the method of towing a vehicle with all four wheels on the ground, as opposed to using a tow dolly or trailer. Some cars can be towed in this manner with no modifications, while others may need specialized equipment.
The tow dolly
A tow dolly is a two wheeled trailer that supports the front wheels of the toad, the rear wheels trail along on the ground.
Towing a trailer
The alternative to towing 4 down, or using a tow dolly, is to use a separate trailer to carry the toad.