Here's what I'm leaning towards so far, but I don't have the bags yet to know for sure what will or won't fit:

In 10.25"x 9.5" x 6.25" Molle enhanced butt pack (inside main bag):
1 - Cold Steel Tanto
1 - 2400 Mainstay
1 - LED flashlight
1 - small first aid kit
1 - 32 ounce Nalgene
2 - granola bars
2 - 20 ounce bottles of water
1 - regular compass
25 - waterproof matches in matchsafe
1 - bottle water purification tablets
1 - gallon ziplock
1 - poncho
1 - space blanket
1 - knife shapener

In 6"x4"x4" Molle electronics pouch (inside butt pack):
1 - Bic lighter
1 - mini Fox 40 whistle
1 - keychain compass
1 - Inova Microlight flashlight
1 - Starflash Ultra signal mirror
1 - bottle water purification tablets
20' - 550 cord
pocket knife
10' - duct tape
1- quart ziplock bag
1 - contractor bag