Each pearson should have their personal bag.
Food -- I have 3 MRE's in mine, jerkey, nuts, hard candy, a couple of life boat rations, peanut butter, crackers, several cans of soup, and a couple of cans of fruit. Instant coffee and tea bags are also included.
Water -- 2 32oz bottles of water. Water straw. I also have severl 1 gallon jugs of water I carry in the trunk of my car.
Spare ammo -- At least 50 spare rounds for my carry pistol.
Fire -- Lighters, matches and 4 road flares.
Spare clothes -- A complete change of clothes in subdued colors, poncho, hat and a goog pair of hiking boots. 2 -3 extra pairs of socks.
Blades -- A good lock blade and a good sheath knife.
Lights -- Surefire combat light and extra batteries, AA mini mag and spare batteries.
Odds and Ends -- Small roll of duck tape, 50 ft of para cord, crank up radio, work gloves, pepper spray, a bag of large zip ties, Handi wipes to clean up with.
Med kit -- Small first aid kit and foot powder. (I plan on adding several of the 5 hr energy drinks to my kits also)
Cooking -- I carry a small folding stove, (stove will also burn small twigs and scrap tinder) 12/15 heat tabs and a canteen cup.
This list is by no means complete but a good start. My kit is set up so that I can leave unneeded stuff behind and add stuff as needed or found.