No matter where you reside you're going to pay it one way or another. Here in PA there is no property tax on RV,s or vehicles, just sales tax on the front end. We do enjoy however one of the highest, if not the highest, fuel taxes in the nation.
If you don't like it move somewhere else, you may save a little, you may not. It's the price you pay for having roads to move your RV on, public parks with campgrounds of which most are not self sufficient and depend on general fund dollars, and other infrastructure.