If you are burdened with baby-sitting the scoutmaster's or committee chairman's son it is easier to solve the problem locally rather than at Philmont. Down LiteLoft MicroLoft Polargard HV - need compression sack if also using an internal frame pack. Sleep Clothes kept inside the sleeping bag away from your other clothes. Clothes worn during the day are typically used to wipe hands and mouth when eating and become smellables. Use full length sleeping pads because it keeps your bag off the bottom of the tent where it might get wet during a rain storm and if your tent leaked.
Advisors definitely get a thermorest.
Rain Gear Purpose of rain gear is to keep you warm. After hiking a mile while wearing a poncho or other rain gear, the hiker will feel as wet as on the inside as the outside of the poncho because of the condensation from the perspiration. The only rain gear that Philmont mentions are rain suits. Ponchos are not mentioned in the Guidebook to Adventure. Cheap vinyl ponchos just won't work.