Plan on outfitting the camper independently from previous RV would be best start. When we switched we unloaded previous coach into boxes. If you try to sort it, transfer 'what you need' from one to another a lot of stuff you dont need will end up in camper. If its boxes seems still accessable, items you decide you need can be sourced from boxes.
As far as orginization..We sort of have identified certain cabinents for like items-though some 'crossover' because of where something might fit-generally If I can catagorize I know where its at...