I don't think August 9th would be a good date for Kelly Park. There are two events for the 9th, one is River Woods in Auburn Hills and the other is Westfield Park in Portage. Portage is no big deal due to the fact it's located on the west side of the state. I think most who would attend Kelly Park are also the ones who will be at River Woods.
Perhaps the 16th or the 23rd would be better. Whichever date you decide to choose, let me know if I can be of any help. I'll put it in the Events Thread when you getfeedback from the membership on an appropriate date.