Have a great time at the festival.
Everytime I see a posting for recommendations for photography I've always thought that there is no place on the planet not worth photographing. Every location is interesting to the person's mind who can see a moment or object or person worth photographing.
I tend to shy away from where everyone else has photographed so to explore on my own to hunt for that magical moment that can't be predicted.
I'd say the entire Norfolk / Great Yarmouth area is worthy of exploration.
Sorry I can't be more exact than that.