Arborists armed with chainsaws and climbing gear are always busy cleaning up from the last storm or trying to prevent the next blackout. Recreational climbers can use the same skills and equipment.

Unlike rock climbing, tree climbing requires nonstretching, static rope. Poison Ivy, rated to 6500 pounds, is a favorite of arborists—it's flexible and holds knots well. 2. Petzl ELios Helmet, $66 ...