If you are coming from out of town, there are lots of hotels and B&Bs but the August bank holiday is a really busy weekend so it's a good idea to book soon.
Also some hotels (but not all) have a minimum 2 night stay over bank holidays.
You can find lots of them on trip advisor, booking.com and laterooms.
Easiest is probably to stay at the reception hotel The Livermead Cliff. But here are a few other ideas too: