Just curious... Do you have a regular bathroom in your Trill? Up front, we have what I call the bathroom closet, which houses the port-a-potty on a raised spot. Our teenage daughter likes it, but it means just a half-wide bench seat, so my husband sleeps in the van. (But he doesn't mind, because the van has a great stereo, and more space than the Trill's bed!)
Regarding Ensolite, I think I'm going to steal a little bit from a cupboard for a patch...