Jack, many thanks for posting your project. You can see my little project in the "Jayne and Hero Come to Texas" thread if you haven't seen it already.
I really like your two drawers for the big closet idea, and will do it in my Fox. One problem I'm dealing with in reorganizing is that the manufacturer could have made at least 9 drawers taller and longer in the Fox. I live in it full time and have a good payload rating, so I plan to lengthen those drawers somewhere down the road.
As far as the Waves, how did you mount them, or are you using the little feet? I started out with a Wave 8, but after several years got tired of not having a thermostat for it. It only had three settings; low, med and high.
Two years ago I changed over to a one-brick propane heater with a thermostat. It seems to burn less propane and the thermostat makes a big difference. I have it mounted like I did the Wave, on a piano hinge mounted to the corner of the fridge. For traveling, I swing it back against the wall and hook it over the screw in the wall.
Because the Fox is so well insulated, the one-bricker does a pretty good job down to the "teens" tempuratures. Temps in the single digits I can still stand; I just have to bundle up a bit. ;D
I always leave a window and one ceiling vent cracked a bit. My CO2 detector has never alerted, so I'm keeping enough oxygen coming in. If you don't have enough air coming in these heaters will eat up all the oxygen and you will wake up dead! :'(
The Fox does have a furnace that also ducts around the fully enclosed and insulated tanks, but it is noisy like a 747 and I hate to run it.