I went to Philmont two years ago; I carried a Spyderco Military with a serrated edge (CPM-S30V/G10). It was great for its lightweight, excellent retaining clip, and sharp edge. Despite the high-quality blade, it wasn't very useful in that the only things I cut were food packages and parachute cord, and for whittling a few extra tent stakes. I highly recommend this knife for use as a Philmont blade---if you're looking for light weight, and big cutting power for an emergency, the Military fits the bill.
However, there was a risk in losing it or having it stolen (yes, at a Scout Ranch). I would recommend something cheaper, maybe a Spyderco Delica due to the fact its an excellent knife, for about $50, lightweight, and is as reliable as anything out there. Search for info on this blade. Again, it is lightweight, small enough not to piss off other Scoutmasters, and has great cutting performance and ergonomics.
I would also recommend the Pacific Salt. It has a high-visibility yellow handle if you drop it in the woods or along the trail, the H1 steel in the blade holds an excellent edge and won't rust, and the FRN handle is comfortable and clone to that of the Endura 3. The blade is wicked-sharp and will cut like you wouldn't believe. It makes an excellent EDC in every sense and is $47.
God bless you, America, and our men and women overseas.
Good luck at Philmont.
KATN,
Wade
619G6