Cannot think of one good thing about camping in the rain...Sorry!
We camp A,LOT and dread it raining. Don't forget your 20p pieces for the camp site tumble drier, or if you are in the sort of camp site we often frequent, with barely a loo, then bin bags for all the wet stuff. 're-think the camp site, opt for a commercial site with a club house, at least you can get in the dry.
We never go for minimalist camping. Huge vulgar tent, filled with all our nice stuff! We ar not hardy at all, maybe that's why you hate it in the rain? Last year the boys spent hours bouncing a large sit on exercise ball around our tent!!
For your own sanity, relax the no screens rule if it is going to he really rainy.
It's a non negotiable I'm afraid, if only because we would also be tempted and I have children who would nag if it were available. It forces us to be more inventive!
Practice telling the children that having iced water in the pub is a treat, as you cannot justify spending £10 on j2o drinks for them as well as your gin, every time you want to warm up.
Ain't that the truth! Camping cocktails packed already, soda and blackcurrants can look remarkably like a j2o!
Thank your lucky stars that you have an obscenely large tent to hide in, Don't spend too long worrying about taking it down in the rain or getting it dry again.
No, a thankless task and always doomed. Conservatory draped in nylon for three weeks afterwards, nerve mind!
Enjoy, you simply would not be British if you have not tried to enjoy yourselves whilst camping in the rain.