Just got back as well. Some feedback:
As crew advisor, the constant harp for lightweight preparation went somewhere between nowhere and listened to.
My pack weighed 35# with 4 days food, 1/3 tent, 3+ liters of water, and my share crew gear when leaving first day. Fine for me. Others in our crew ranged from high 30's to more like mid 40's, including 44 for a 98 pound scout. Highest was 49 for another advisor. We had a large group, 13 people.
What worked: Amsteel rope, noted in other post. Great purchase, although almost didn't make the trek. We had a brand new ranger, 5th trip out, and her position was no substitute ropes. Had to go over her head to get cleared up. Loved it and the weight savings was over 3#. Silnylon 12 x 12 shelter with hiking poles, weight savings over 5# if you count using separate poles. We had rain a few times, and we could rig this a number of ways, using rubber innertubes to securely hold the poles together. 100% great. We took one 12 quart pot and one 4 quart pot with al. pie pans for lids. This was just right for our group. Coffee and/or second dinner item in the smaller pot, dinner in the big one. Micropur was very easy to use and really didn't have any taste, at least to me. Way easier than filtering.
What didn't work/couldn't use: Had to bring sump frisbee, couldn't persuade ranger to use paint strainers. Didn't make my day, but after the bear bag rope issue, I really didn't want to push anymore on the first day. Turkey bags: We brought them, used them the first couple days, then stopped. Boys will be boys, and mixing the dinner to avoid lumps always punctured the bags, even when taking care. So the pot had to be cleaned anyway, although only liquids were in there. And getting all the goods out of the bags was messy. So we just used the big pot and the scraper. We had pot cleaner hungry scouts who learned to use the scraper very well, LOL. We used Zip loc or turkey bags for pudding and potatoes and they did work well.
Stoves: We have very nice Optimus Nova stoves. The white gas at Philmont, basically sucked. We have never had a problem with these stoves at altitude or anywhere, using Coleman fuel. I made sure the fuel was filtered with my filers, but stove performance was frustrating. We cleaned them pretrip and had performance issues. Had to be the fuel. They did work, just not the way they should have. That being said, our fuel consumption was very low. Coffee every day for 3, and dinner every night. We brought 2 20 ounce bottles and one liter bottle filled to the lines for cooking at base camp, meaning not filled to the brim, probably 4/5ths. We never refilled and had about 1/2 liter left over. That's about it on equipment.