John,
California has Non Commercial License Classes for RV type Vehicles. Below is what License would be required for different type Vehicles and types of trailers that may be towed with said type Vehicle.
Tom G.
Non Commercial License Classes:
License classes are based on the size of vehicle you wish to drive or the weight of the trailer you wish to tow. No passenger vehicle, pickup truck, or RV may tow more than one other vehicle without a Commercial Class A license, with endorsement.
If you have a Non Commercial Class A license you may drive all vehicles under Class C and you may tow:
any vehicle under Class C or,
a travel trailer weighing over 10,000 lbs. GVWR, not used for hire, or
a fifth-wheel travel trailer weighing over 15,000 lbs. GVWR, not used for hire.
With a vehicle weighing 4,000 lbs. or more unladen, you may tow:
a livestock trailer over 10,000 lbs. GVWR but not over 15,000 lbs. GVWR if the vehicle is operated by a farmer to transport livestock, not for hire, and within 150 miles of his/her farm.
If you have a Non Commercial Class B license you may drive all vehicles under Class C,
a housecar over 40 feet but not over 45 feet, with endorsement,
and you may tow all vehicles under Class C.
If you have a Class C license you may drive:
any 2-axle vehicle with a GVWR of 26,000 lbs. or less, or
any 3-axle vehicle weighing 6,000 lbs. or less gross, or
any house car 40 feet and under, in length.
You may tow:
a single vehicle with a GVWR of 10,000 lbs. or less including a tow dolly, if used.
With a vehicle weighing 4,000 lbs. or more unladen, you may tow a:
trailer coach not exceeding 9,000 lbs. gross, or
trailer coach or fifth-wheel travel trailer under 10,000 lbs. GVWR when towing is not for hire, or
fifth-wheel travel trailer exceeding 10,000 lbs. but under 15,000 lbs. GVWR, when towing is not for hire and with endorsement.
NOTE: No passenger vehicle regardless of weight, may tow more than one vehicle. No motor vehicle under 4,000 lbs. unladen may tow any vehicle weighing 6,000 lbs. or more gross. (VC ยง21715)