I am an adult advisor, and am scheduled to go to Philmont with a troop this summer. I am planning on taking my Tarptent one man Rainbow, as we expect an odd number in our trek. It is a bit over 2 lbs, and lists for $225 on the Tarptent website. Tarptent makes excellent products. It is a single wall tent, which does involve some compromises.
http://www.tarptent.com/You might talk with Henry Shires who runs Tarptent, maybe he has something the can do for Scouts. I don't know.
Another place to try is Six Moon Designs, but I have not used any of their gear, although I understand it is also excellent.
If you purchase either using the links on this website, the webmaster gets a little contribution to this site.
We will be expedition 710-205, from Fremont CA.
Maybe we will cross paths at Philmont. Hope you have a great summer at Philmont
Don, ASM