Our trailer is about 34ft tongue to tail. towing no issues. Since most of our camping is FS dry camping or older campgrounds, that 34ft does limit us in either campgrounds completely or restrict us noticeably in the sites we can fit into.
Based on the places we camp a trailer 28ft would open us to quite a few more sites and some more campgrounds. FS campgrounds often are either large enough and manuverable enough for most any trailer or pretty much set up for tent/camper vehicles or maybe an aliner etc.
Now our experience is in Western states, your results may vary.