An update to my original post. We got the Hallmark Guanella about a year ago this March and got it out 3 or 4 times over the summer. It turned out that we couldn’t spare the storage space the rear cabinet afforded. (My husband, ever wary of being stranded somewhere and not having a tool or supply may be over-doing it a little…but since we exclusively camp in remote areas I can’t fault him too much.) We ended up getting A CleanWaste Go Anywhere portable toilet system, which folds down to briefcase size and weighs 7 pounds. Maybe if we add storage boxes of some kind to the rear, we’d be able to make the modification.