There is a special class of RV called a Toy Hauler.
Honestly, I struggled to put it anywhere because Toy Haulers can be added to almost ANY type of RV (Class A, travel trailer, 5th wheel), but I’d say the most common place is to make a Toy Hauler into a 5th wheel configuration.
What is a Toy Hauler? It is an RV with added carrying capacity AND a garage.
The idea is that you, ummm, “haul toys” with it. Tricky name, eh? I’m hoping that if you get a toy hauler you’ll put a nice Harley or Indian in it and not just a bunch of junk. Please? for RV52’s sake – no junk?