Flashlight, pref head mounted.
Some reflective tape so you can find your tent in the dark.
Umbrella.
Seat, deck chair or sit mat
If you are doing any real coooking, pack salt, pepper, sachets of sauce or whatever you like. You can get pretty good no faff heat and eat meals. Tea, coffee, beer, whiskey as required.
First aid booboo kit inc burns cream for the stove, plasters for the knife, arnica for crushed thumb from tent peg mallet, anti bug stuff for mossies, tick tool for removing ticks, tetanus jab for when you tread on a tent peg.