3 days, stretchable to 5, between my BOB and Ditch Kit, becuase in a worst case scenario I should be able to get to my folks in 5 days on foot. Unless I'm dead or detained as a suspicious looking individual. :P

Once there, set for about three weeks if everyone shows up.

In the dorm, I tried to keep about five days on hand; with more storage space, I want to be able to bug in for ten days without stretching. That is before I hit BOB.