Exactly same as we do at home. We just take the duvet off the bed and usual nightwear. We don't have any heating on at night. We also take some fleece blankets just in case and husband is a cold morsel so he often needs a t-shirt instead of just boxers.
Can't wait for our first trip at Easter.
As Andy above, same as at home, sometimes use a small fleece blanket over top of duvet if really cold, dont like leaving the heating on, drys the air too much in my opinion.
Normal pjs with blown heating on low (get asthmatic cough when turned too low) and 4.5 tog duvet to lie on and 9 tog on top. Got the idea from someone on here who does this as can than swap them over in hot weather. Do have a fleece blanket just in case and did wear socks on fri night as was getting cramp.
------------- From tents to trailer tents to a tin tent to an air tent to trailer tent and back to tin tent!