I just made my reservations for the Lake Express Ferry. The 12:30 Ferry on Sunday 7/15 is booked! If you plan on ferrying home, you can still catch the 6 am or the 7pm Ferry.
I'm going try calling again at the end of the week. Maybe there will be cancellation.
Anyone heading east through Chi Town and wants a riding partner, let me know. I'd like to leave Sunday around 8am.