Call who ever you have car insurance with. I called Allstate and they did mine. Just asked what I valued it at. Also got towing insurance. They pay up to $250.00
Revising this..... Hagerty won't do rv. Period. Doesn't matter if it's a custom truck or not. Even if it's not registered as an rv. They won't touch it
We are camping just north of you up in Conquest with our "new" truck we just finished. We ended up getting insurance thru happy days in Florida. About $500 full comp and collision. We looked for a long time and nobody would insure a medium duty tow vehicle and if they did it was $1,200.