The most effective way to prevent mishaps is to adequately prepare for the trip. Knowledge of the area, weather, terrain, limitations of your body, plus a little common sense can help to ensure a safe and enjoyable trip.

• Travel with a companion. You don’t want to be by yourself in case of an emergency. Leave a copy of your itinerary with a responsible person. Include such details as the make, year, and license plate of your car, the equipment you’re bringing, the weather you’ve anticipated, and when you plan to return. If you’ll be entering a remote area, your group should have a minimum of four people; this way, if one is hurt, another can stay with the victim while two go for help. If you’ll be going into an area that is unfamiliar to you, take along someone who knows the area or at least speak with those who do before you set out. If an area is closed, do not go there. Know ahead of time the location of the nearest telephone or ranger station in case an emergency does occur on your trip.

Learn more here http://www.fs.fed.us/recreation/safety/safety.shtml