my friend.. when the SHTF you will be the guy sleeping in your car on the side of the road, hungry and thirsty. I'll try to wave when I pass you.
The entire point of a GHB or BOB is having it when you need it.
If by only taking it when you when you think you will need it.. then.. well.. I hope yo can predict the future. and if so.. I need to get with you on some lottery advice and the next horse raise (wink).
having a practical yet non over the top BOB/GHB is EASY.
last year my buddies teenager made 'zombie apocylapse' prep boxes for 'the guys' that come over and go shooting..e tc.
these were in flip open top 'tupperware' type boxes the same size as a shoe box.
each kit had seperate ziplock bags in it stuffed with various items... some rubber gloves, a led flashlight, cheap knife, pack of twine, few feet of solid wire, pair of cotton gloves with ruberized fingers, some hand sanitizer and individual hand wipes. 3 1-use superglue tubes and a mini roll of duct tape and some sterile sealed gauze pads.
they were cheap to put together as most of those items were 1$ items at a dollar store / harbor freight.. etc. putting together 4 boxes cost about 20$ boxes included. we got them at halloween last year so it was fun. 3 times in the last month i've gone into that box to use something. ( glue , flashlight, piece of tape ).
I do lots of farm work and driving to jobsites for construction work. I almost always have a few bottles of watter rolling aound in the back seat. For the same reason.. I almost always have a can or two of nutritional drink/protien shake and a box of healthy meal bars. I can't always run off the farm and hit lunch.. so sometimes it's a choclate protien shake and a fi-bar etc..
that pretty much is an emergency get home kit...
Looking at the recs and whatnot.. x days or xx days of food someone needs.. and the various ways to go about storing it.. I can tell you one thing I do.
at my house.. I keep a good supply of those nutritional drinks/protien shakes.
they take up the same space as a bottled water.. and are food+drink.
in most cases the experts tell you not to eat if you are dehydrated.. you need fluid for digestion. having a meal you can drink is not the same as having surplus water.. but if packing space is limited and you need 3 days worth of emergency food and water.. a case of shakes and some extra water takes up about the same space as the water alone.. minus bulky food. easy to eat on the go... don't have to unpak and prepair it like some of the milspec and civiliat flat packed ration meals.. especially the dehydrated ones..
ps.. I ALWAYS got a firearm with me... that's a no brainer... add to that a good tool kit in the vehicle.. and I got a chance anyway... better than a smack and poke with a sharp stick anyway..