+1 on the vac seal and freeze method for the b-hole sammies. They do become the consistency of about a 10 year old cliff bar with this method so be prepared to do a lot of chewing. The plus side is they become more packable.This. Hard to beat these vacuum sealed for lunch. Often it's too much for one sitting and I wind up eating it later if I'm out after dark or save it for the next day.
Toasted blueberry bagel
Crunchy peanut butter 1/4" thick on both halves
Honey drizzled over the PB
Lotsa bacon!
Vacuum seal a bunch a few days before and freeze them, they'll last a couple weeks as long as they don't get left in the sun or get above 70*+.