Per Minnesota statutes:
"Subd. 3c.Recreational vehicle combination.
Notwithstanding subdivision 3, a recreational vehicle combination may be operated without a permit if:
(1) the combination does not consist of more than three vehicles, and the towing rating of the full-size pickup truck or recreational truck-tractor is equal to or greater than the total weight of all vehicles being towed;
(4) the trailer is only carrying watercraft, motorcycles, motorized bicycles, off-highway motorcycles, snowmobiles, all-terrain vehicles, motorized golf carts, or equestrian equipment or supplies, and meets all requirements of law."
Minnesota statutes.