How do you move a motorhome purchased from another state

Romore, weigh stations as you enter a state?
I have never had to weigh any of my trucks or my Class C. I was predominately travelling in the South East and it was never an issue, I did get stopped in NY once for towing my boat on an interstate but as a military transfer issue they understood that in my home state it was a personal vehicle and let it ride.
Is it different entering Canada or the western states?