add a deck to class c

Don't know if this can give you any ideas, but I once saw a van at a county fair, think it was a Dodge version of the Sprinter type, he had a couple of large panels on the roof, and two more attached end to end on each side, hinged bracket at the roofline of the van, so they folded pretty flat to the sides while travelling and basically became short canopy awnings when he parked and extended legs to hold the outside edges up.