It really depends on your needs. Some need/want that longer bigger unit. Others prefer it smaller. There are lots of smaller trailers that have slide outs now. Our HTT has one and it only goes out about a foot, but it makes a huge difference in floor space and "getting around" one another.
Our HTT is 22' and we love it. We would not want anything bigger. I store next to my garage, easy in, easy out. We can take it anywhere. Our trips are pretty much along what you do.
We had a 17' HTT for 10 years. That was fine too, as most of our time is spent outside.
Again, you have to go look at them, sit in them, and imagine yourself using them a week at a time.
