Insurance cost vary from state to state. Since we have home bases in two states we know for sure. My cost won't match yours and we have the rig, full timers insurance, truck and prius all bundled together so I'm not sure how to break just rig and truck out. We use the Miller Agency to find us the best deal. They used to just do RV insurance, but with folks leaving the lifestyle they now do it all. Lots of good options out there, but they work for us.
http://www.millerrvinsurance.com