Here is an example of how I built the 72 hour kits for myself and my wife.  In addition to the items always contained with them we have the ability to add to the kits given just a few minutes of time.  We can quickly add sleeping bags, grab our tent and more water.  We have bottled water in our food storage next to the packs and it will only take a few seconds to throw them into the packs.  The only reason I don't have them there to start with is I don't like to store the bottles inside the packs.  I am always experimenting with the layout, so this set up is subject to change at a whim, but the basics you see here are pretty much a standard.  I also carry a 48 hour/get home kit in my car with about 2/3 of the contents you see here.  I carry that kit in a Hydrastorm Predator (http://www.blackhawk.com/product_detail.asp?product_id=4143&d=)  As you can see I am partial to olive drab, but really the color is not as important as the pack itself.

--Jason

Phoenix Pack  (http://www.blackhawk.com/product_detail.asp?product_id=1227&d=)

18 MRE entrees

18 MRE side dishes

1 3600 calorie food brick

2 Nuwick candles

emergency stove

stainless steel pot

small first aid kit

2 matchbooks

$30 (one dollar bills)

2 t-shirts

2 utensil sets

toilet paper roll

tube Neo-sporin

LED flashlight

Bic lighter

3 Day Assault Pack  (http://www.blackhawk.com/product_detail.asp?product_id=1201&d=)

18 MRE entrees

18 MRE sides

2 sets children clothing

1 box 9mm

4 packaged tootbrushes

2 utensil sets

$30 (one dollar bills)

sheated knife

package of plastic army men

extra glasses

Bic Lighter

wind up LED light

4 water pouches

2 glow sticks

2 rolls toilet paper

2 matchbooks

1 Nuwick candle

1 wash cloth

tube Neo-sporin

wool blanket

LED flashlight