Hi psyko! Taking scouts, be SURE you are aware of the signs of AMS (Altitude Sickness). A few people can wake up after a night at that elevation, and can be really hit hard. Descending to Lone Pine as quickly as possible would be the right solution.
It probably won't happen, but make sure all the leaders are aware of the possibility, and observe each and every one of the kids to make sure they aren't sitting around looking a bit "green around the gills" in the morning.
There's a woman (has been a member here) who is a scout leader in San Diego who tried a hike out of Rock Creek (above Crowley Lake), and became sick overnight. Unfortunately, the group helped her climb even higher, and, well... they were lucky something worse did not occur.
That being said, Good for You taking your kids on a High Sierra adventure! So many scouting groups skip out on the camping.
