You can keep it made when it's in. You can actually use the bed while driving if you don't mind laying across the mattress,,,not an ideal option, but still possible.
At our dealership we recommend a product called RESIST-ALL. It can be applied to the exterior and to all non-sleeping surfaces inside-sofa, carpet, cloth, leatherette. ScottProduct SpecialistCamp-Land RVBurns Harbor, IN
If you don't like the split mattress try a piece of egg crate foam. This should level out the split portion.ScottProduct SpecialistCamp-Land RVBurns Harbor, IN