Gerber Diesel Multi-Plier

If you're carrying your bag on, skip this item unless you want to give a TSA agent a gift. But if you check your bag, a good stainless steel multitool is indispensable on an adventure vacation. We like this one because its tools lock into place and can be deployed with the flick of a wrist. Use the knife to cut food on a picnic, the saw to rip through kindling for a campfire, and the pliers, screwdrivers, and scissors to make small repairs. [$74; gerbergear.com]