There is an REI located at 2220 Village Walk Drive, Henderson, Nevada. I checked Mapquest and it says the REI is 7.98 miles from McCarran International Airport and estimates travel time at 9 minutes. However, it is the opposite direction of Death Valley. There is also a Sports Chalet at Charelston and Rampart which is a little out of the way. There is also a Copelands right off the 95 at Lake Mead. It is located in the Best of the West Shopping mall. I would call ahead to make sure they have what you need.