Down sides to being a TT Camper?

It all depends on what you want to do. We have pretty much had at least one of every kind of RV, other than a class C. Before the TT we had a class A motorhome. Those are truly self-contained. But, the yearly maintenance is no joke. We like to go hook up in a campground and chill, or at a dog show with hookups. So, we very much prefer the travel trailer. The downside would only exist where we had no hookups and wanted AC and 110 volt power. I see people using portable generators all the time (at dog shows) with their travel trailers where there is no shore power. It's not preferred because you have to fill it up every few hours and people like to use those contractor grade generators, not that anyone seems to care at the dog shows. Nevertheless, the best case scenario is that the generator is running on fumes every 7 hours. On the motorhome we could go for a few days with a full tank of gas before it hit the magic level in the tank and starved the generator out, which never happened. Other than than, I'll take a travel trailer for the extra usable room and the ease of ownership/low relative maintenance.