Ken, I didn't mention the P-1 ( which I own & love)
because it doesn't have full length stays or framesheet---but why not. When I carry loads over 20 lbs. in this pack ( which means I have a tent along) I use some or all of the tent poles wrapped within my torsolite or foam pad to create virtual frame stays--very comfortably and effectively,too.
In the Hoover Wilderness, I either bear bag a la PCT
or take along an ursack. No problems since forever.
I hear rumors, though, that canisters may be required as soon as next year to conform with Yosemite rules.