Keep a list somewhere of things to take - then every time you pack, you can check things off.
A very random list of other things...
Electric hook up if you're going for more than 2 nights
A couple of camping tables
More than one lamp - we have one like this, which has detachable torches www.amazon.co.uk/dp/B01C5O7E2U/ref=cm_sw_r_cp_apa_glt_fabc_D5DQ36A0W17S6DMXZ8HB?tag=mumsnetforu03-21
We have never been cold on an air bed - always have rugs underneath it, then a duvet on top of it (under the sheet) and a duvet to sleep under. They pack down small in vacuum bags, so don't take up much space. We have a blanket over the top of that, sleep in ski thermals if it's cold, and take a hot water bottle.
We take a couple of sheepskin rugs - they're lovely to stand on when getting dressed/changed
Crocs are perfect for when you're on site - easy to slip off at the tent door.
EYE MASKS! I sleep until my alarm goes off with a mask. Without one, I wake when the sun comes up. Earplugs too.
A folding BBQ - can double as a firepit. We always book sites which allow fires.
A groundsheet to go under your tent. Means when you pack up on the last day, the underside of your tent should be dry and pack away easily, and lessens the chances of you having to get it out to dry off when you get home.
We generally take a bolognaise or chilli, ready made, for the first night - just needs reheating with pasta. And sometimes take fajitas - take onions/peppers pre sliced in a tupperware, likewise the meat. A nice easy cook.
Big blue ikea bags. Lots of them. We have one for cooking things, one for utility/general camping stuff, one each for clothes - much easier than scrabbling around in a holdall, and we transport bedding, rugs erc in them too
Microfibre towels. They dry SO much quicker - trying to get normal towels dry is a headache.
Cans of g&t, mini bottles of wine.
I could go on... but that feels enough! We only got back into camping about 4 yrs ago, and we now have a camping corner in the garage. Everything we would need apart from food and clothes is on a shelving unit there, so we xan just pack the car (ticking off the list as we pack) and go! If you have to faff around finding pans, cutlery, crockery, washing up stuff, tea towels, bedding, rugs, chargers etc it becomes much more of a undertaking and feels like a big effort.