monjon wrote on Nov 18^th, 2008 at 2:29pm:

...I' think I'll try to stretch 2 loafs of bread for 6  or 7 days and vacuum pack pita for the rest of the trip.

Monjon,

I really like to vacuum pack meals, but have found that a pack of pita or tortillas will become a single dough lump if vacuumed.  You could try wax paper between each pita.  I've never had much luck with pita lasting longer than 2 or 3 days without getting very moldy.  For a 15 day trip, I'd have to recommend bannock (search for recipes in this forum).