+1 on the PSK and add a SAK or good multi-tool. Both can be kept out of sight so no one thinks of him as some sort of nut or "not a team player" (a bad thing to be labeled in today's corporate world).

My problem with the idea that the "truck" is loaded with everything is what happens if someone does something really stupid and the truck and "everything" goes off a cliff or burns up etc. etc. etc. All the eggs were in one basket.

I can't see any good reason not to take a pocket survival kit (Doug's or a field expedient one) and a SAK/multi-tool.