[Fulltiming]

California limit is 65' combined or 45' for a single unit. Towing a large vehicle in California has, in at least some cases, resulted in tickets for over-length. I don't know that I have ever heard of anyone getting an over-length ticket in an RV in any state other than California or getting a ticket in California for the coach being over 45'. It may be that some other infraction may have been involved also resulting in the over-length citations. In most cases, without running a tape, it is difficult to identify a 45' from a 47'.

Note that while states may restrict RV size limits, the fed's do not. http://ops.fhwa.dot.gov/FREIGHT/publicat.../index.htm states:
"Recreational Vehicles
Recreational vehicles are not CMVs subject to Federal size regulations (Figure 16)."