Greetings All, I'll share what we call the Cosmic Commode and how it came to be.
My van interior (I have no idea what floor plan it would be) had the usual cabinet that just barely fits the toilet and then a wardrobe cabinet with a curtain rod above it. Both drove me nuts. The carpet has a lip at about the cabinet door. This meant to slide, which it didn't slide, out the toilet you had to lift the toilet up over the carpet and wobble it across the carpet and not smash your hand on the shelf above it. Not convenient. Plus the wardrobe cabinet had no shelves so gear would get piled on the bottom and have a huge wasted space above it. So to solve the wasted space problem I flipped the doors and relocated the shelf. I have added several other shelves since then. One of the things I seem to do after every trip is find new ways to use every cubic inch of space for something.
It was like this for a few years and one day, literally a day, before leaving on a big trip I devised a slide cart for the toilet. I must confess that I copied this idea from other overland vehicles that use similar toilets but in nicely finished drawers. My slide was made out of stuff laying around the garage so not really cabinetry level work but it works way easier than before. I did purchase the drawer slides from Lowes and they are the heavy duty type with the detente that holds it retracted when slid in. This is nice for times when the van is leaning to the passenger side so when you open the cabinet door it doesn't unexpectedly deploy. For added stability there are two fixed casters on the farthest point that are adjusted to roll on the carpet. The only thing is that if I was to do it again I would get everyting as close to the floor as possible. When you sit on it the seat feels a little higher than a normal toilet. I could have easily lowered everything by 1/2" but it's not that big of a deal.
As far as privacy I just close the blinds. I have added a few snaps to the ceiling just behind the front seats that I can snap the SMB windshield fabric drape to. Similar to folks that have a curtain rod there I just wanted to dual purpose the curtain I had.
Anyway, perhaps something like this could be an option for others. This was not expensive or to difficult to do. Although with the skills of some folks they could take it way to the next level.
Have big adventure