I have used Coachnet over the last several years and really like that it covers my whole family. I have AMA (AAA) RV plus but had to get a special exemption on the Volvo because they said it was commercial. I told them they were not the service for me and would be losing my business. They sent me a letter that I keep with me that says the Volvo is included in the towing package.
I tried and just gave up on uploading via that link. There are some nice Canadian sites that are big rig friendly. Even the state/province field doesn't give me a choice of Canadian provinces even though I see them on the map. Needs some work.