We use those zip up washing bags for washing delicates/pants (you know the ones I mean?) to put washed, clean pots, pans and plates in to drip dry hanging off a tree.
We use a bag for life for each person: clothes, chargers, books, games, torches etc it stops the. constant "where's my...?" Also a spare bag for life for showers. They fold up very small for transporting (we have a small car).
I second the pill box of herbs: pimienton, rosemary, oregano etc.
A long, long washing line and pegs, three of us would hang up three bath towels, three pool towels plus swimming kit daily! I made a zippy bag with an old coathanger hook in it to hold everything and keep pegs spider-free.
Electric pump for inflatable mattress is invaluable! Hardly a hack, but well worth the money.
Bucket to put shoes in at entrance to the tent. Bunch of cardgames: uno, monopoly deal, virus. You can play noughts and crosses with twigs and stones.
Make a scavenger hunt for kids (are you taking kids?) : find 3 different leaves, a seed, something red, a pebble, a pine cone as long as your thumb, etc.
We have a basketball of water we keep under a tree for keeping things cool (beer, milk, juice) keep refreshing. Usually cold enough in the morning for cereal milk.I
We don't wild camp, but neither do we camp at places that hire out fridges etc. We have EHU and an electric hotplate, we can charge phones. The last place we camped was really wooded, it was glorious! Great place for the hammock (€10 decathlon job), shaded, so natural, lovely.