I would try the following weekend, if it works with your schedule. July weekends should still be good. July has typically been good because of the high ticket prices and MK blockouts. Some of the passes are not being blocked all of July anymore, so it's a bit unknown. I would keep your eyes on this site once the new MK is released in January. See what the blockouts are in July and try to avoid those dates (probably weekends will be best for you). Also, look at the single day one park ticket prices once the calendar goes out to July (only out to May right now). The more expensive the tickets, the lower the crowds. If the single day prices are $180 or above, the crowds tend to be lighter during the summer time. If the prices is below $180, and a lower pass is unblocked, watch out.