With restaurants closed except for fast food, all cooking would have to be done in the RV. My thought is that as long as you're in the motorhome you are socially distant by a lot. Just stay away from other humans except to get supplies, gas, of empty the tank. As an added bonus traffic is down. Just use common sense precautions to keep from getting the virus. Or stick to back roads and enjoy the scenery. Just for a couple days would be enough! I have a sewer dump at my house, properly plumbed into the main sewer line.
I'm not planning a trip, except in my dreams. Just thinking out loud.