I've been looking at a few places to get more information on how I could add a shower and toilet combo to my pop-up trailer. I haven't bought anything yet but will be in the next few weeks. I don't really camp, my family is at the other end of the country and that could be my only way to get there.
I've seen the name Thetford quite a few times in my reading...
They sell portable ones that are self contained. I gave ours, from tent camping, to our neighbor that just got a pop up. Good for when you don't want to wander in the night. You might be able to install an outside shower like a lot of units come with. Just a thought. Then there is always the Bumper Dumped!
__________________
2012 SunSeeker 3100SS Toad-1962 Futura Average 100 + days camping