Inlaws were visiting so I figured it'd be a fun project to switch gears and make a prototype interior with the FIL to figure out and finesse a few things. The mockup has been very helpful already in flagging some things to alter slightly and figuring out how much space I'll have to work with in the cabinets, etc. I was quite pleased at the potential flow of people, someone can be standing up at the main counter (between the sink/stove) and not impede folks getting in/out of the dinette (both sides).
View looking towards the front, under the bed with be ~3.5" tall storage bays. The center two will get a drawer in the front, something in the 18-24" range, the right one will have a flip down front to stuff long items into, the left one I'm undecided if it'll be a fixed panel or not. The bed cover will be hinged to access from the top and get to the backs of the bays, the bays will house the lesser used items. Other than that you see the fridge in its cabinet (I'm going to cut the upper portion of the cabinet back some which will allow the fridge to be pulled out of the camper more easily when needed as its too tight between the cabinets right now), water tank which will have a structural cover built over it so it can be stepped on, and the main counter top where the covered sink/stove will be.
A bigger view of the fridge cabinet. Underneath will house the batteries/power center on the left. On the right will be a storage compartment [16.5"deep, ~18" tall, and something like 16" wide depending on final battery layout]. If I can fit it I'd like to have a flip up lid over the fridge with a shallow cabinet to store misc stuff like keys and such as well as a mirror on the cover for putting in contacts (me) and for the wife.
A view looking into the doorway, you see the fridge cabinet from this angle and some of the main cabinet.
Better view of the main cabinet. Furnace in the lower left, propane box with a grey water jug in front of that, then the 21gal water tank. On the counter planning for the stove on the left (we normally use the right side burner of the stove so not too worried about folks bumping a pot/pan) and sink on the right. See the dimensional sketch below for the area available for cabinet/drawer build out.
Looking back at the door side dinette seat, 40" long. Storage in the box is 39"long x 20" deep x 16" tall.
Other side of dinette seat, 48" long. Storage in the box is 47"long x 20" deep x 16" tall. The table will be able to be put aside which opens up a floor space under it that is 40" long and 37" wide.