RV Travel Insurance?

I am inquiring about travel insurance for an RV Trip that we are planning for next summer. Most campgrounds these days require full payment in advance to make a reservation with no refunds possible.  I need insurance that will cover campground fees in case we should have an emergency and have to cancel one site or all of our trip. This will be a self planned series of places to visit in Colorado and New Mexico..  There should be about 8 different campgrounds over a 6 week period.  I expect the total cost of reservations to be around $3,000.  Does anyone know of any travel insurance for this?