Some ways to lighten scouts loads:
our trips are in mountains in Idaho, nighttime temps in the 30s to mid 20 s each night, generally dry and low humidity in the daytime, but we sweat plenty on the trail.
we weigh packs before the trip, to identify offenders, and to build some incentive to lighten up. Some obvious ways to ligthten a scout pack are to...
eliminate duplicates: clothes. A shirt to wear, and one spare is plenty. Same iwth socks, 2 pair. They can rinse out or wash one per day, and wear it the next day. a clean pair to sleep in would be OK. I take a light weight dry bag as a stuff sac, and half fill it with clothes, water and a bit of soap. Then tumble it around for awhile, dump out water, rinse, and shirt and socks are pretty clean. If you have zip off pants, you don't need a swim suit. If you have nylon underwear, you don't need a swim suit.
if they have a rain coat, they don't need a wind breaker. If they have a rain coat and a fleece pullover, they don't need a heavy coat. Don't bring a heavy coat anyway, bring a wool hat and light gloves, a rain coat and a pile pullover.
lighten up: bring the small version of everything: knives, flashlights, sun block, tooth paste, camp soap, cooking oil, toilet paper. Bring close to what you will actually use.
Don't bring: big hunting knives, shovels, hatchets, saws, heavy coats, mess kits, canteens, MREs, books, binoculars, canned ham, spam,
Do bring: tiny knife, tiny flashlight, plastic bowl cup and spoon, light plastic bottle for water.
The best sleeping bags for our type of camping are $100 down bags, but if a kid doesn't have that, as light a synthetic mummy style bag as possible.
nylon clothing head to foot: zip off nylon pants, nylon long sleeve shirt, 2 nylon t shirts, wool blend socks, wool or fleece hat.