I use Wayfarers as well and I believe they do all provinces not just Ontario.
One piece of advice I can offer though. Don't let an insurance company convince you that they can give you a better price if they bundle all your policies together. While it may well be true what they don't tell you in the result of a claim on your RV. If for example you put in a claim for your awning damaged in a windstorm, it will affect all your other policies as well.
Wayfarer also gives you a discount if you belong to Good Sam and Explorers.
