I just switched my rv back to Hartford with AARP. More and more insurance companies are understanding full-time rving, but not all do. So if you full-time, make sure the one you use does. And make sure you get full-timer's coverage (you'll be covered like a homeowners policy - and for personal effects, etc - differently than a car of part-time rver.)
I was very happy with the insurance co I was using - but they wanted too much to insure my car and I decided to keep them together. I got a quote from Progressive, but the rates were too high for me from them. The other company (I'm leaving) is specifically written for rvers by Explorer RV out of Ohio. If I was only insuring the rv, would have stuck with them. They do understand rv fulltimers policies better than any of the others I've talked to - but I guess I understand now what I need and make sure I get it