I would vote for earlier (7/5-7/6), but just for personal reasons. I will be out of town on the weekend of 7/11-7/12, but I might be able to make it for part of the next weekend (7/19-7/20). Majority rules, I guess.
I see the Coast Guard radio tower, where Billy was identified, every day and always think of her when I see it. I also look for her every time I go across the O'Rorke Bridge, where she was seen a few times. I have not been over to look for her at Russell Station since March, but I'll try to get over there soon.