We've spent 6 days in a row in our 2007 2720, with 2 adults, a 6 year old, and a 6 month old. It felt somewhat cramped after only a couple of days. Mostly due to the amount of extra "gear" the baby needs. (stroller, swing, seat, bassinet, etc..) Much of this we stored outside under the awning after the first day.
Thankfully, the front bunk can be used for storage as our 6 year doesn't require too much sleeping space, (yet).
We also have a 10' x 10' screen room which we use as our "family room" when not seeking the refuge of the TM's air conditioning during the Florida summer.
The biggest complaint I had with the TM in an extended stay is camping without "full" hookups and how fast the toilet/grey tank fills up with 4 people contributing to the uh...mix.
We're heading out again next month for only a few days. Hopefully we'll get better organized and par down the gear each time we go out.
Steve