We were in the Adirondacks two years ago in mid June. Spent a weekend at Sagamore while attending the no-octane regatta in Blue Mt. Lake. The black flies were thick at Sagamore, but there were none at Blue Mt. We camped at Lake Durant the following week with no black flies - just mosquitos and no-see-ums.
There is a running stream at Sagamore which I have read is where black flies breed. Found two good references:
http://www.mainenature.org/blackfly/blackflyinfo.html
http://res2.agr.gc.ca/ecorc/diptera/bf11-dp11_e.htm
Anyway, we have our bugshirts and are ready. Besides, they seem to prefer Leslie over me by at least 10 to 1. I don't remember that much running water around Fish Creek.
We are going to Chain O'Lakes state park in Indiana for M-Day weekend. We recently found it and like it as it seems like a 1 x 4 mile patch of Adirondacks in Northern Indiana.
Looking forward to meeting everyone in three weeks.