August or Sept is about all I could guess right now. Probably best to wait until near the end if you are unsure...
August is a very busy month with lots of events again, such as MASHOUT! (8/14-17) and Labor Day weekend tacking right on at the end. I have the feeling it's going to be either the beginning of August or more realistically, the middle of September or later.
We're also not gathering a lot of whole sacks right now either.