Ill echo what others said. Philmont is about 1) camaraderie 2) programs 3) tackling obstacles as a team.
It is not about simply hiking, there is better hiking to be found elsewhere much cheaper.
1) Plan on getting up early. We rose at 4am, were on trail at 5:30. Hiking in cool morning is essential to enjoying it. Its very hot and dry, some areas, especially in the central and north country, have little or no shade. You will fry like bacon at times. If going to staffed camp with program, plan to be there by noon. Also plan for the time it will take to set up fly, hang food, etc before going to programs. Most of time, best to be wherever you are going by noon.
2) Plan on carrying quite a bit of water at some point, about 1.5 days per person = 6L or so. All seasonal sources are dry. We had 3 dry camps, were only supposed to have one. Dont trust water board that was checked weeks ago if it says "trickle". Philmont is in an extreme drought. Err on side of caution with water. Unless its a large year-round river, dont expect ANY water between camps with wells.
3) Use high quality stakes, preferably Ti skewer stakes. The dry , rock filled ground can be very hard. Cheap, fat, soft aluminum stakes will not go in, or will bend and be of questionable use when try to drive in. More a problem for dining fly than free standing tents.
4) Wear a long sleeve shirt for sun protection. Leave the greasy sun screen at home. Its not that hot in the low humidity. Keeping direct sun off of skin is better than being cooler in short sleeves.
5) Use lip balm frequently.
6) emphasize light weight and minimalism.
7) Forget the oops rope totally. Its not needed. It is just another unnecessary item. Raising and lowering bags is not difficult, and will happen several times a day anyway usually. Most of the time its only a 2 person job taking a minute or two.
Dont tell your ranger this, just dont bring it. Once on trail he will have no choice but to let you. Same goes for any other substitutions you want to make.
8) They use new food vendors this year, no mountain house. Some 2P meals make 4 servings. Basically, they are giving way too much food, you will not need all of it. Some meals we only cooked 3 dinner meals out of the 5 we had. Same goes for boxes of crackers for lunch, you wont need all of them. Purge the excess when you get it, dont carry it for 4 days. You WILL need at least an 8qt pot, if you cook all of some meals. We had a 6 qt filled to the rim with only 4 food bags on one meal.
Far too much food on several meals.
9) Potable water at hunting lodge is virtually un-drinkable. Contains sulfur and smells like rotten eggs.