Everyone focuses on outside pockets so you have access to things on the trail, a place to put a wet tent or parka, etc, and that's all cool.
But how about pockets on the INSIDE? Those can be of very light material and needn't be waterproof. Then things that might get lost in the bottom of the pack can be found quickly (light, warm hat, gloves). Plus a very small inner pocket for return-to-civilization items (car key, a few $20s, credit card, driver's + fishing license, any permits).
If you'd tested the concept beforehand, I'd even consider a whole-pack divider, vertically. Again, it could be very light material, stitched loose enough to fold to the sides if you want one big bag. But when deployed, you could have a camping side (tarp, bag, pad), a food side (stacked with last day on the bottom, next meal on top), and a column of clothes. I hate rooting through a pack for an item and dividers would be a way to avoid that (stuff sacks or multi-, zippered compartment packs weigh more than a taffeta divider or two).
Edited to add: if you had two, large, vertical inner pockets running the height of the pack, initially, you could have food/camp/clothes divided among them and the gap between them. As you depleted food and fuel, you don't need as much volume and stacking in only the 2 pockets would avoid everything slumping to the bottom of a single bag compartment. I realize there are other ways to reduce pack volume from the outside (compression straps, lace-up sides, etc), but inner pockets could provide that function potentially at lower weight and certainly with less snaggable features on the outside.