Coming up to Bristol, I would suggest climbing Cheddar Gorge (stop in Cheddar, it's a bit touristy, but has nice cafes), descend down into Chew Vallry, stop at the Salt and Malt at Chew Valley Lake for fish and chips, and enter into Bristol via Chew Valley. What what road you use for a descent into Chew Valley. There are a few different roads. West Harptree is busy, good surface. There is a road (track really) that runs parallel that is down right sketchy. There is another route which is less steep but I would need to look at a map for road names/direction etc. Bristol and surrounding areas (bit into Wales as well) are my stomping grounds, so happy to help with suitable/scenic roads