Looking for suggestions for thin backpacks for use as a GHB in the car. I have a "hidden" compartment where it could be always kept however this compartment is not very deep. I've got about 20" x 20" x (almost) 6" to work with. I'm thinking actually 2 packs roughly 10 x 18 x 5 might be ideal as if it were just me I could take one and if the wife were with we could take both with extra food and such in the second one. Something like Urban Disguise actually fits pretty good in the compartment as I found a local camera store that would let me take it out and try it in the car. There is also a backpack harness accessory that turns it into a fairly comfortable backpack. The catch is that at $180 (for each bag+harness) I'm looking at close to $400 for a couple of these with tax (and/or shipping). There is another bag in the ThinkTank series, the model 60 which is 16.5 x 12 x 6 and a couple should just fit but at $225 with harness I'm approaching $500 for just a couple of bags! I can probably knock this down a little shopping them around instead of buying direct but it is still a lot that could be better spent on food or other supplies. I am hoping that someone might be aware of some other more reasonably priced options that are no more than 6" thick and ideally something around 10-12 x 17-19. None of my searches have come up with anything yet.