Questions about a semi pulling a 5th wheel...
In canada, the rig would be licenses as a motorhome hence, it doesn't come under most legislation..this also applies in the states.
All you need is a regular license plus your air brake certificate..as long as you are pulling a trailer that LOOKS non commercial, you don't have to pull into weigh stations..
I suspect that you do because you look "commercial". People going to race tracks are not exempt either I believe..
I have been driving everything since I was 14....
Actually, women driving vanrockerts with kids strapped in the back scare the hell out of me..