Chew Valley has a new footpath and cycle path that you can access from the main carparks. It provides new access to walk the lake side. A coffee/ tea stop at Woodford Lodge is well worth adding to the exercise and enjoyment
Salt and Malt do wonderful fish and chips if preferred.
https://visitbristol.co.uk/whats-on/this-week-in-bristol will give you an update on what is on in Bristol during your stay.