I carry it all, at all times...theres even a sandscoop and a tiling spade in the back of my open pick up right now and theres a foot of snow on the ground. I for sure have an extra one of everything, especially a screwdriver, you'd be amazed at how easily even a good one can snap when your ripping or prying at something, I've got a set of chest waders in the cab, a couple of changes of clothes/socks, extra shirts, paper towels, tape, windex, batteries, kneepads, etc. Theres usually a bottle or two of water and an apple or orange rolling around somewhere underneath the seats, several lighters, a cigar from when my daughter was born 30 years ago that says "Its a girl" just in case I really hit a gold brick!. I've been very hard on the equipment, with no ill effect, but I would be worried about the heat in the summer if a fellow lives down south, and I'd be worried about a break-in in certain areas like McDave says..I just dont want to be caught without the wand if I get the chance to swing! I can live without the Pinpointer, but I know I cant hunt without the screwdriver!
Mud