Head for llanthony priory (multimap/google it) as your base. Good campsite and a celler bar, bogs, water etc was abou 2quid a night couple of years ago.
grab an os map and just head west for a day or two. Then come back. Great scenery.
Walked it 30 years ago Ivanhoe Beacon to Avebury 5 days.Cycled both ways 10 years ago 4 days.Real good trail nothing to strenuous.Did wild camp when I walked it presume you still can on or just off the trail.