REI Spring Sale (www.rei.com)
Bandannas - $2.93 for red or white. Recommend you have at least two of these (Scoutmaster Bob carries about 5)
Liner socks (to wear under your outer socks) - $6.19 isn't the best price but at least it's less than full price
Outer hiking socks - $9.69 is a good price for REI brand outer socks
and HERE (these are a little heavier, if your boot size runs large)
Multi-towel - 75% off! Compact and super useful for the times you can shower in the Philmont backcountry
Compressible Pillow - a little bit of a luxury but you'll love having it
REI Rain Jackets at 30% off - a truly rain-repellent jacket is a MUST-HAVE for Philmont
Dishware set - you really only need the bowl and the spoon and fork but this is a great deal
SPORKS - Mr. Trejo is buying a bunch of these and will be happy to sell you one for $1.50.
EMS Upgrade Your Gear (www.ems.com)
Thunderhead rain jacket (a great price!)
Thunderhead rain pants - not necessarily a requirement for Philmont but useful if it's a very rainy period when we get there. If you don't mind the spend suggest you buy a pair and take it to Philmont and decide at base camp whether to take on the trail. These can serve as your one set of long pants (that is required for certain activities).
Running gloves - a good choice for cold mornings and even prolonged rain; lightweight and wicking
Men's Ultralight Down Jacket $29.90 - incredibly lightweight and compressible; great for chilly Philmont evenings (limited sizes; check with the Center City store)