March and April can be windy months here in Arizona. If you are planning on camping you may want to consider some sort of a tent to protect you from a lot of the wind-blown sand that moves along in the foot above the soil surface. If you plan on tarp camping, you could wind up with a lot of sand in your sleeping bag. Also, it can get pretty darn cold at night even though the days are warm and pleasant. Prepare for cold and windy nights. Take plenty of water; at least 4 liters a day until you acclimatize. Unless it is really warm, you shouldn't have to worry about rattlesnakes that early in the year and if they are out, it will only be during the day. One last thing, just about everything in the Arizona desert has thorns, sharp edges, teeth, thorns, stingers, spines, is poisonous and/or has sharp points. Beware of everything! <img src="/forums/images/graemlins/laugh.gif" alt="" />