Just had the coverage discussion with my insurance agent this past Thursday. I have been with the same company for over 25 years and have my auto and homeowners policies with them (Coumtry Companies) The vehicle policy covers the Class A and items that are installed in the vehicle like the A/C, refrigerator, cabinets, etc. My homeowners policy covers the items that are inside the vehicle that are not part of the vehicle, like clothing, dishes, GPS, televisions, etc.
The point is, there are distinctions as to which policy covers which items in the event of an accident. You need to be sure to check with your insurance agent(s) to determine which policy covers which items in your MH. That becomes particularly important if you have multiple companies that you are dealing with. Have your agent show you your coverage in the policy declarations, don't just accept "Oh, you're covered" from your agent.