Most that have experienced Philmont and Philmont believe it is important to train and prepare your crew before going. Philmont has initiated their PASS, Philmont Advisor Skill School, to help adult advisors prepare and train their crews.
It would be even better to have a previously experienced Adult Advisor from your area work with your crews by giving talks and demonstration on personal and crew gear, cooking & clean-up, food & smellables Bear Bagging before taking your crews goes on local shakedown training trips. Hopefully not someone desiring to circumvent Philmont’s established techniques and practices.
Shakedowns are when you find out if your gear works in all kinds of weather, if your tent and rain gear keeps you dry, if your boots and socks are comfortable and don’t cause blisters, if your pack is too heavy and if your stove and cookware work. Training is when your crew learns how to purify their water, pitch & strike their tents, set up a dinning fly, cook & clean-up, Bear Bag and backcountry sanitation.
I believe it is best to conduct at least three such shakedown training trips locally, preferably in line with the Backpacking Merit Badge requirements of two nights and at least 50 miles each. You may need to offer four trips so everyone can make at least three.
You should conduct crew pack shakedowns before you leave the meeting place before every trip to be sure every member has the essential gear to be safe and dry, eliminate unnecessary inappropriate or duplicate items. And a chance for experienced advisors to counsel members on good gear choices and packing techniques. Weigh packs before and after the shakedown.
Philmont provides a lot of YouTube videos on How to Set Up a Campsite, Cooking Method, How To Wash Dishes, How To Bear Bags, etc. and you should read and rely on their Guidebook to Adventure.

