Go retro, very in.
There are scads of websites devoted just to this activity, just Google! Visit your local library, newsstand, home improvement center, rv supply, rv dealership and they have dozens of magazines on this very subject. What do you Have? A camper? Travel trailer? Motor home? People use the term "camper" when in fact they may have something other than a camper. Here is a breakdown of rv's and their proper names.
And here are some sites on rv remodels.