We went from Progressive, which doubled in (5) years with no claims, to Blue Sky which saved us around $800 per year. You really should consider insurance companies that specialize in RV coverage and not those that cover homes, personal vehicles, etc. Here are some links for you to use for obtaining quotes for your particular RV.
1.
http://www.blueskyrvinsurance.com/about-us/2.
http://explorerrv.com/3.
http://www.fcisinsurance.com/rv-advantage.asp4.
http://www.gilbertrvinsurance.com/5.
http://www.millerrvinsurance.com/index.php6.
http://www.nationalinterstate.com/As others have said, you really should check/get quotes from other companies about every 2-3 years and compare prices. Won't cost you anything but your time to do this.