dont know if you have it or not, but here is the daily report web site, its the best way to get the most current conditions in the park.
http://www.nps.gov/bibe/daily_report.htmYes all of the sites in the Chisos are closed for over night camping, this is due to fire danger , not heat. the mountains are cooler than lower elevations, but the Chisos is the only place with any elevation for camping so that's out of the question.
All the rest of the primitive and or back country spots have ZERO shade and will be hot.
Current Park Conditions:
Due to severe fire danger, the Window Trail is closed, there is no overnight backcountry camping in
the Chisos Mountains, and there is a charcoal burn ban in effect throughout the park, except for Rio
Grande Village and Cottonwood campgrounds. The Pine Canyon Rd and northern ends of Old
Maverick and Glenn Springs Rds are closed for road work. Current drought stage: 1. Conserve water
James