Start off by shopping local at the Hexham Farmers Market. Then there are all manner of fairs and shows happening tomorrow. The best of them all is the iconic Roman Wall Show, which is a true agricultural show the likes of which you will not find many places else in the country.
There is also both the Humshaugh (at 1) and Haydon Bridge (at 2) Fairs tomorrow, Hexham Races starting at 2, and the Corbridge Steam Rally all weekend.