I also think Maverick is the best coaster there, followed by Top Thrill and Blue Streak.
It's been a while since my last visit, but I think mainly what you still want to do is get there before opening so you can head to the back of the park as soon as the gate drops. I assume everyone still heads to either the coasters at the front of the park or Millenium Force and Top Thrill Dragster first, so you can either go there first as well and try to do them before they get really swamped, or try to hit them up later after the initial wave dies down. Personally I would head to either Maverick or Magnum first.
A lot of the older coasters will keep pretty short lines (Corkscrew, Mean Streak, Blue Streak, Iron Dragon, Gemini), so you might try to do those inbetween the big newer ones. Don't forget to stop by Blue Streak - it's tucked away a bit, but it's a gem and one of my personal favorites. Also don't pass up the Cedar Downs carousel - it's way more than your typical carousel and is also a gem from the past.