We usually eat out at night too, or have a BBQ, but usually take stuff to make bacon/egg butties in the morning while everyone is getting washed dressed etc. A bacon/egg butty is also great for persuading the lazy ones to get up.
I'll leave the food and drink to your imagination, but make sure you've got snacks and biscuits, camping makes you hungry
Sleeping bags
Rolly mats (but we use old duvets instead, warmer and softer.)
cagoules
At least one spare change of clothes, and one extra jumper each.
Camping stove
Frying pan, Saucepan (to cook in or boil water)
Cups, basic cutlery (not plastic, it melts), paper plates (saves washing them.)
A pop bottle for collecting water.
Wet wipes, (use them for cleaning cutlery, frying pans etc, as well as cleaning people.)
Torch & spare batteries (so many early nights because we've run out of batteries)
Something to sit on. It doesn't have to be chairs, blankets are good and multifunctional, but take something or you'll get a cold bum.
Toiletries, towels etc (which we always seem to forget.)
Not necessary, but we always use them.
A pack of cards
A thermos flask (in the morning when everyone has eaten we boil enough water to fill the thermos so we can have hot drinks at night without having to mess around with the stove again.)
Also when you go out for those meals at night borrow sachets of sauce, vinegar salt etc. It saves taking lots of bottles.
I'm sure there's stuff I forgotten, but that's typical of our camping trips. Even though I keep all the camping gear together in a box we always forget stuff.
Have fun! Wish I could go camping, but preggy belly is making sleeping in a bed difficult so I think sleeping in a tent would be pushing it a little.