Heading to Philmont next year (July 2013) with two treks from my scout troop.
We plan on incorporating as many BPL concepts as possible (sil nyl tarps, lightweight stoves, good gear choices, etc). As the amount of gear is reduced and better gear replaces heavier and bulkier gear it is unclear what size packs we should be looking at.
I've read everything I can find on appropiate backpacks for Philmont and I'm well aware of the PSR recomended sizes of 4800-5200 ci for internal frame and 4000-4200 ci for external frame packs.
When embracing the BPL philosophy, at what point are the PSR recommended pack sizes inappropriate (i.e. too big)?
Can those that have gone down this road give some guidance on what you used?
To keep things in perspective I would also need to know about any special gear you used that would shrink your needed volume (e.g. used tarps instead of tents, 2 quart pots instead of 8 qt, UL down sleeping bag, etc).
Thanks in advance!
Long time lurker/first post