I've really enjoyed this topic and can't believe how long it's been alive !
I ended up making a "truck box" for me and my friends to put the boondocking/survival items in - at least the ones that are relevant to when also not boondocking,
e.g. just up in the woods or logging roads, etc.
It has an axe, ropes, tow strap, various tools and supplies, fire starting stuff, dehydrated food, fishing gear, pellet gun, tarps, various survival items and the like.
Pretty handy. I just throw it in back whenever I head for the woods now. nice piece of mind - especially 50 miles out some logging road you might not see someone for... well... long time. in the snow.