My tips are :
A dream catcher 10cm self inflating mattress to ensure a good nights sleep.
A duvet or a square sleeping bag ( never a mummy type one)
Your tent must have a porch that you can cook in and be an air tent for ease of pitching
Only book campsites that are not holiday camp type places so the smaller family run sites are best. Chose ones with award winning shower and toilet blocks. And make sure the pitch sizes are huge - camping too close to other people is awful.
Take a camping toilet if you have young kids or a bladder that wakes you at night. Make sure everyone knows the camping toilet is for night time emergencies only and empty it every morning ( I put mine behind the tent during the day so no one uses it )
Read all the reviews and don't book a site that mention noisy campers or large groups camping ( unless that's what sort of party you are )
Keep food simple - bbqs and salad or pasta and rice dishes.
Take an electric toaster if you have a hook up
Get a hook up!
Take gin ( make sure the camp shop sells ice ) and res wine.
Buy decent comfortable camping chairs ( but the £10 ones from Helfords . Ours cost around £60 each.
Get to the shower block early to beat the queues - you wake up early when camping anyway so shower as soon as you wake. I never have to queue.
Have shower flip flops in your toiletry bag.
Make the kids shower before bed so they don't have to worry in the morning.
Camp with another like minded family if possible - we've had the best times camping with friends.
I have camped for 15 years , often two weeks at a time and I am never more relaxed than when I'm sitting outside my tent with a cuppa or a glass of something nice.