It is LEGAL IN CA to have passengers in a 5-wheel, not though in a travel trailers. Also, there must be communication between the 5er and the TV and the doors must be avail to open from both inside and outside.
See the following from the DMV webpage.
Transporting Passengers
Here are the rules for transporting people in RVs or recreation trailers:
•People are not allowed in a trailer coach while it is being towed (CVC §21712(d)).
•People are allowed in a fifth-wheel trailer coach while it is being towed (CVC §21712 (f), (i)).
•A camper with people in it must have an unblocked exit door which can always be opened from both the inside and outside (CVC §23129).
