To the OP ...
If you want a trailer with a toilet but can forego the shower there are a select few models of A-frame hardside trailers that offer just this, along with a DSI fridge with a freezer, UVW ~ 2700 lbs and a much lower profile than a full height travel trailer so much less strain on the TV from wind resistance, much better fuel mileage. One such example would be the popular
Rockwood A213HW ... simple to set up, simple to tow. 2018 models have a front dormer for increased headroom, 2017 and earlier versions don't have the dormer and are even simpler to set up. I've even been considering one for us, maybe next year. :)
