1 site with woodland and forest bell tents in Bath
The following sites don't share their availability with us yet and cannot be booked online
Upton Cheyney, Bristol, Gloucestershire (5.1 miles)
A proper farm campsite with bell tent glamping set between Bath and Bristol, with easy access to the Roman Baths.
Other areas you might like to consider

Woodland and forest bell tents in Cornwall
Beatiful beaches and stunning scenery.