What is too long to get into State/National Parks?

I don't know where you got that idea?

The overall width restriction is the same, our 8.5 ft or their 2.6 meter, 102 inches. That was also part of the agreed NAFTA standards for all of N America. It applies to Federal/Interstate highways. Each individual state has the option of different limits on their local/state roads. Of course, oversize loads are allowed, with special permits.

Shadow_Grey wrote:
I assume that with the bigger campers that are 8'6" or a smidgen wider you cannot get into Canada anyway?