Below is a list of the stuff I take bikepacking (mostly to remind me, but I thought I may as well share it).
Saddle Bag:
500g Vango down sleeping bag
Waterproof jacket(s)
Merino wool top spare
Spare underwear.
Gloves
Spare Batteries
Tools: spare tube, pump + levers, Chain quick links, Tape (wrapped around pump).
Small first aid kit.
Handle bar bag:
1kg Coleman tent
412g Alpkit numo air mattress
insulated jacket
Handlebar light and headtorch
Pockets, Other:
Phone/camera
2* Water bottle
Sunglasses
Food:
Breakfast:
Granola in portioned bags with milk powder (sometime coffee powder too). So just add water.
Cycling Snacks:
Chorizo
Cereal bars
M&Ms
Snickers
Longer trips:
usb phone power bank
Vango Stove
Gas canister
Fire strike/ cotton wool
Stanley elongated pot/pan
Spork
Cleaning sponge
Toothbrush/paste
Cable Lock