I don't know where the preferred seating is. There are really only a few rides, so I'm not sure if it's worth it. I think the usual advice of go at opening and do the rides first will still work. We've waited a really long time for the raft ride in the heat of summer, but other than that nothing was too awful of a wait. And with only a handful of rides, one or two longer waits doesn't add up to as much as most theme parks.
PHXscuba