Shorter length pads can be purchased, or longer pads can be cut, to reduce the amount of bulk and weight (head to knee length is sufficient).Self-inflating pads are not good for Scouts because they can be punctured.
Check your cover, or backpack, for “waterproofness” prior to the trek.
Sleeping Bags are available in many sizes, fabric, fill, color, and price.
the three heaviest things are your backpack, tent, and sleeping bag, so if you want to save a lot of weight invest in these items.
There is lots of discussion about the proper amount of weight that a boy can carry safely.
All types - young, mature, grannies, BBWs & housewives.