Onesies are good for dc at night.
Crocs - take off inside tent.
BABY WIPES - we don't have little ones anymore but get through so many wipes camping - would be lost without them
Disposable BBQs
Lightweight raincoats - we tend to take layers of clothing rather than cold weather clothing as well as summer clothes - so just add fleeces and cardis to the pile of summer stuff.
Definitely thick socks for night, and hot water bottles.
I also like my winter boot slippers on an evening.
Fleece throws a must - good for sitting around in the evening.
Those hangy up things which usually hang underwear from washing lines - hang them from a gazebo/inside the tent with tea towels, cloths, swimming stuff etc. Very handy.
Gas heater is a must for us and makes things cosy at night.
Games, books, colouring stuff etc.
Love the freezing wine idea, we're off on Saturday so will be doing that. We also freeze some bottles of water for the first day, they are great when setting up and having the annual argument
We do cheat a bit though as we have a folding camper rather than a tent. Love the whole thing though.....let's hope for sunshine this week.