Carry a police whistle and small mirror for emergency use. Rodent Burrows Avoid setting up camp near rodent burrows. Fleas from rodents, if they bite you, can transmit the bubonic plague. When encountering travelers with horses or pack stock, move off the trail on the uphill side and allow them to pass. If you plan to use a portable stove or build a campfire, you must either obtain a wilderness permit for the wilderness area or in areas where wilderness permits are not required, obtain a California Campfire Permit.
Some areas restrict use of campfires and portable stoves during periods of high fire danger.
Campfires are never allowed in Desolation Wilderness. By using only a small amount of wood, campers who come after you will be able to enjoy a campfire, too. Select a level spot away from overhanging trees, bushes or dry grass. Avoid the base of steep hills, as fire travels uphill quickly. Clear a circle 10 feet across down to bare dirt.