Bath Chew Valley Site

Tandy1

Have tried to book 3 nights for Bath Chew Valley (affiliated site), but unfortunately they only take bookings for 7 nights, unless we chance it and try to get a late booking if available.  I know this is an affiliated site, but it means we are not able to
visit this site unless we stay for 7 nights, but as we have a motohome, we like to `move around`.