I carry a bunch in my truck too. One thing I always keep in there is a spare poncho, a blanket and other "stuff" like that. My camping stove is in there, a roll of TP, chains for all 4 corners, a come a long, pot, 2 gals of water, a hot seat (and a bucket to sit on), plastic bags, fork and spoon, large FAK, large fire extinguisher, flares, orange contruction site tape, Gaffers tape, a dual band J pole antenna and shor mast, with coax for my ham rig (gets out a lot better than the truck's antenna) - Heck, until last week, I even had a spare ham rig in the truck - but I figured between the dual bander, a 2m mobile for APRS, 3 HTs (dual bander, 2m and 440Mhz rigs) with spare batteries - I probably had enough radios. I've got food, wire ties, AND lacing cord, a spool of 550 cord, 30 feet of 1.5" flat line, some steel carabiners (heavy, but are stronger and more corrosion proof) - I could go on, but

The joke? It's a "city slicker" truck - I add MORE when leaving the city