EARPLUGS! Earplugs and eye masks.
You want to take our portable BBQ? I can get it to you if so. I recommend the self-igniting coals.
You can borrow our one-burner grill, too. It's a brightspark.
Lotsa matches.
I have a 'Buff', this sort of do-rag that makes into a bunch of things - hat, scarve, neck gaiter, etc. - that I use to cover up my nasty, greying greasy hair on campouts. It's especially handy for cold faces at night.
Some line and clothes pegs and some Ecover or Dr Bronner's Castille soap - you can use that for EVERYTHING, including bodies and dishes.
Firelighter. Even with rings and good kindling, there's nothing like a good fire.
If you have a dryer, collect the fluff from it.
Collect cardboard egg cartons, too.
Stick fluff in egg cups in cartons.
Melt old candles over bain maries. Pour over fluff.
Stick under kindling. I promise you, that mo' fo' will go up in flames even in the worst of weathers.