One my longest trip in days is around 7 which is also the length of time I generally take off at once from work. Distance is around 1800 miles counting some driving around time.
I wouldn't personally choose a TC for full timing unless I knew I could gain an advantage of the size that outweighed the disadvantage of being small. That said, it's great for a weekend trip.
For a family, everything is too small. For a couple, I'd really prefer a smaller Class A for long trips with long duration or pickup with fifth wheel. Of course, the best is have all types and choose the right tool for the particular trip.