Try Gliding Clubs
Despite what has recently been written about gliding clubs not welcoming power pilots, there are some that with prior arrangement will. Gliding clubs often have accomodation for people attending courses, and it isn't always full.
I recently stayed for four weeks at the Kent Gliding Club whilst working nearby. Apart from the first week in a tent, I was able to stay in one of the bedrooms adjoining the clubhouse for the rest of my stay.
The welcome, the facilities and the prices were all very much to my satisfaction. Although I didn't fly in, I enquired for a friend who may have wanted to, and the Chief Flying Instructor said it wouldn't be a problem with advance warning.