I'm in Oregon and purchased my 5th Wheel used from Illinois. In Oregon, the plates stay on the vehicle and you register them as the new owner. I was therefore surprised and unprepared when I arrived to pick up the trailer and he had removed the plates per Illinois standard procedure. I towed it home without plates and got lucky...no issues. I did Insure it before the trip though.
I believe that if you have the MH professionally delivered, the delivery company will have their own temporary plates for the journey? No experience with this though, so I could easily be wrong.
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2013 Rockwood 8289WS w/Diamond pkg
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)