We either tow a small flat bed with toy or two (usually around 2000 lbs) or have a large enclosed trailer that can handle more toys plus has 84 gallons of fresh water, 18 gallons of gasoline and 25 gallons of LPG for extended boon docking (up to 8000 lbs so far when filled).
In most states you are allowed to travel in a truck camper, but you will hear most of these forum members discouraging it since most campers do not have restraints and none have a roll over protection rating.
We do know one truck camper owner that tows a "Mother in law" trailer behind them when the family travels together. They can use one vehicle to get to their destination, but have private space when they want it.