Actually, rides weren't even our priority. We also did 4 character meet-n-greets, at least 6 trick or treat trails, and saw the fireworks. If you are going mainly for the rides, I would have to imagine you would be able to get through a ton of rides compared to a normal five hour period in Disneyland (except for Haunted Mansion and Space Mt).
Nice! We are crossing our fingers that we'll be able to get in several rides and treat trails done in time for fireworks.