Really, for bare bones RTR or Bust....you could find a clean piece of ply wood or masonite 6' X 3' in size, a thick
exercise mat 3" thick, (or two of them..enough to be comfortable to sleep on) and a sleeping bag.
An ice chest, some boxes to contain cooking utensils and canned foods & items needed to cook simple meals with. If you can find some containers suitable for utility water sponges, wash cloths etc and a couple shrink wrapped trays of drinking water bottles, then you could pack some casual clothing in card board boxes enogh
for a week's visit to something like RTR.
Once there if you have a camera or Cell phone with a camera in it you could then start looking for ideas that you would want to incorporate into your rig.
Something that may be handy to have to record your notes in is an inexpensive voice recorder. Many of these will record quite a few hours of voice notes and up load them to a lap top via USB. Even an inexpensive Cam Corder with SD card memory used with a laptop could achieve this for you.
Such a visit could be like going to a State Fair to gain new ideas.
Then once you return home you may have a better idea of what you would want to do. You would also
have learned first hand from others who have done it....what works and what doesn't in practice.
When I first started in my travels I learned much of this from Campers in the State Parks when sitting around the camp fires I was invited to each evening. Some of those people had older Class A RV's,(Winnebago's and Champions) a few Class B "Camper Van's", (Chinooks & Travelcraft) and lots of Class C RV's (from various producers) Most of these were on Dodge platforms .
But it was largely word of mouth and sharing of ideas face to face for me back then. But you could learn from this similarly.