My GF and I did part of the Appalacian Trail last year. 10 days total. We carried everything in our packs-food, tent etc.
We want to do something this year for a 5-6 day stretch but have not decided where yet-probably on the mid west or east coast.
Hiking is the best.
We were just in Tennessee, but it would be great to do the whole trail sometime.
At least one can dream!
Try the Grand Canyon, if you haven't already. It is absolutely AWESOME way down in there, especially tenting by the creek at Phantom Ranch. It's incredibly beautiful in May when the cacti are blooming.
I really, really want to do that again sometime too. As for now, it's hikes on a local bike trail and through the neighborhood. :)