When I was looking to upgrade my trailer, I had priced one in Regina. That commission salesman assured me that because they were part of the Route 66 dealer network that I would have no issues getting warranty or other service work done here in Calgary.
Now, I didn't buy it- so I never put it to the test. Here's a link to it in case you are curious.
http://www.route66rv.com/page/classic-care-promises
The other thing to keep in mind is the subtle differences in models. Many manufacturers have an east and west model for each trailer; with subtle differences.