I went to the one in the lakes for a long weekend and utterly hated it.
Plus points: Good pool, car free environment, lots of birds and rabbits all over the place.
Bad points: Trapped in a holiday camp. Expensive and poor quality food. Biking is rubbish, I took mine and the only tracks are between ‘attractions’. Activities are average and expensive.
It seems to me like a very expensive and commercialised way to have an packaged ‘outdoor’ weekend for people who don’t really know how to have an ‘outdoor’ weekend. The best part of our stay was a picnic on the shores of Ullswater on the way home. My advice is to just book a cottage/log cabin somewhere with some mates and have some control over the situation.