We absolutely adore camping...I really didn't think I would as I like clean sheets, I like putting my make up on I like hot water ect. But it's such fun it's amazing if you get the right camp site.....we don't normally bother with electric hook up as where we go the toilet/ washing up block has sockets for phone chargers and hair straighteners.
As others have said washing up equipment like bowl to carry stuff in, plastic plates,washing up liquid, plastic forks and spoons, tea towels, pans and a frying pan.Utensils like a spatula, wooden spoon ect.
Lots of fleeces and blankets, camping chairs and cushions.
I wind battery powered fairy lights across the tent strings, they look gorgeous and cosy at night and help you find the tent on the way back from the loo as well! All the tents look the same in the dark.
Get your shopping when you've set up just don't leave anything valuable in the tent. Don't forget salt,pepper, tomato ketchup, cooking oil, firelighters/matches and candles which look nice on your table in the evening get some big jar ones they may ward off insects as well.
Plenty of toilet rolls, baby wipes, calpol, sun cream, plasters, anadin and lots of socks.I took 10 pairs for DD last ime we went and they all got wet or muddy in two days!
Cheap croc type shoes are brilliant as you don't want to walk mud into the tent and its such a pain pulling wellies on and off constantly.
I take a giant Tupperware container full of curry and rice for the first night usually so we can just heat it through on the cooker.
The second day when we've unpacked we do a BBQ. Using disposable BBQ and the usual sausages, burgers ect, keep these in a secure cold box overnight. Never leave any scraps of food of drinks out it will attract rats/ foxes ect.
Have a brill time take bats and balls, swingball, scooters, colouring books, loom bands, ect. And your kids will make friends before you even unpack!!