However, if you're worried about it, call the company and explain what you are doing. If they have any problem with it, tell them that if you don't have a written rider in your hands within 5 business days, you will A), change carriers and B), go to the media to explain exactly WHY, that their company is all that is standing between you and people in need.
May I suggest holding off on part "A" and "B" of the above recommendation until after you have secured coverage elsewhere.
As too many self-converted coach owners have found, insurance companies offering full coverage are not lined up to serve our needs.
I ended up doing what BG6 recommended...to get insurance. Changed farm, 3 cars, and truck after 40 years with State Farm. No claims ever.
They would not insure comp/collision on my conversion. They would do liability. Drove it 'bare' for a season.
Consider your insurance situation carefully before dinking with the agent.