Two options,
It has its own car park between Thorpe and Ilam, £5 to park, short walk to stepping stones, just beware both banks can get pretty waterlogged this time of year because of heavy rain, wellies or stout waterproof boots. Thorpe cloud is a short but steep walk to the top, Great views of the dale and stepping stones.
You can follow the river upstream to Milldale over lovers leap, plenty of caves and some wooden boarding to traverse.
The other option is to park at Milldale and walk back to Dovedale, there is a small free car park on the edge of the village, it’s about 3 miles to Dovedale following the river.
Walked it many times either way.
Another option is the Roaches a large rocky outcrop between Leek and Buxton, plenty of photographic opportunities.
Also Google Padley Gorge, a little bit further west but great for waterfall shots.