<< We then plan to spend the afternoon in Wells, visiting the cathedral as well as Vicar's Close, Bishop's Palace and the Archdeaconry. Is there a car park near the cathedral? >>

iirc there was a car park just on the market place outside the cathedral area. After walking a few steps you stand in front of a green lawn with the cathedral behind it. Concerning pictures - I've no idea about aerial views. The picture I love best I've made with a tripod in the night.

Baerbel.