Everyone has their own valid opinions as to trailer choice. Simple as they are, the choice can be complicated. We're very happy with our, then new, 2011 13' Scamp without
shower/toilet. We are (mostly) former backpackers and car campers. In our later years (we are 60-somethings) we wanted to camp more easily, comfortably and have the ability to take longer trips since we are now both retired. We tow with a Subaru Legacy sedan.
Most paid campsites, public and private, as well as gas stations have decent toilet facilities. Those that have showers are also decent. Our porta-pottie in the trailer serves well for mid-night runs and for emergencies. The only time we miss a shower and toilet is when we are boon-docking (no facilities). Then we just go into backpacking mode and wash-up with a sponge bath. It's not for everyone, but we do consider our trips "camping" not "glamping" (except for my interior decor, see photo of Southwest motif).
When there is no toilet/shower in the 13' you have a dandy "sofa" that converts to a bunk (sleeps 2 more), has storage compartments and room for the pull-out porta pottie.
I remember many nights dreaming of our trailer choices and the permutations of options. For us, the choice was right AND we enjoyed the trip to and from Minnesota from California to pick it up.
Good luck with your decision!