Now I am giving you advise on the Mayflies on Sinclair because I have never fished Blackshear. The Mayflies life span is quick, just a few days to hatch, breed and die. On Sinclair I get multiple hatches per year during the entire summer. I have seen them hatch up until the end of August. Natures fish bait is amazing. They cannot stay away from a light and the fish will feed until they are glutted on them. GOOD LUCK and ENJOY!