Canadians buying from the USA

woodhog wrote:
Do you have to have a temporary permit for each state and province that you pass through or is one permit from one state or province good for all the other states and provinces that you transit.

Every State / Province can make it's own rules but typically if your temp permit is valid in one, they honor it in another.

That said, to be sure you'd really want to call the DMV of each State / Province you plan on driving through. Also keep in mind that what the law says and what they enforce isn't necessarily the same (e.g. some states have lower limits on maximum length and width but I've never heard of any RVs being stopped for that).

The other thing is that different states have different rules on who can get a temp permit and the cost (e.g. AK will only issue temp permits to US citizens, FL will issue a temp permit to anyone but you need to pay FL tax on the vehicle even if you aren't registering it there, etc).