We're not local or anything but we went at the end of June and the longest we ever waited was an hour and that was because we didn't realize that Top Thrill Dragster didn't open early that day

We were there Sunday & Monday, stayed onsite so we had the hour advantage and the lines were all manageable. I spoke with a couple people there and they told me that Saturday is usually their busier days and of course any holiday weekend.
This was our order on Sunday - Millenium Force, Mantis, Maverick, Mean Streak then lunch, then the girls rode Wicked Twister (my DH & I just couldn't handle that one after lunch

), then Magnum, looked at TTD but the line was way too long so we rode some of the other rides - didn't much like Corkscrew but loved Raptor (by that time the line was very short), saw a show and went back to the hotel. Came back later in the evening and rode Millenium and Magnum at night.
Monday we got there at opening and went straight to TTD & waited, waited, then we were the 2nd car to ride went back and rode it again after another 30 minute wait, then we rode all of our favorites again (Millenium, Magnum, Mean Streak) before changing our clothes to ride all the water rides. We finished the day by riding Millenium at dusk in the front car - this one took us about 45 minutes.
Have fun when you go. We'll be going again next year since it will take us that long to gear up to drive the 8-9 hours it takes to get there!