Hey everyone. Planning to head to the Black Hills in South Dakota around Memorial Day weekend. How wide spread is the Didymo infestation in the Black Hills?

Any suggestions as to where a person should go to chase a few trout? I usually spend some time ABOVE Deerfield Lake but water levels were quite low the last couple of years. Have also fished BELOW Pactola but understand there is a Didymo problem there.

How about Spearfish Creek?

Any suggestions? Thanks.