The sunrise safari is similar to the regular one done as a park ride except it's limited to around 30 guests, no poacher story, is about 45 minutes long, and is done around 7:00 AM before the park officially opens so there's some "behind the scene" advantages. A breakfast at Tucker House follows the safari. The cost is $49.95/person. The guide gives lots of information, animal stories. and the photo opportunities (because of the length of the ride) are greater than when going on the AK park ride.
You do need theme park admission tickets to book the safari, so it's not something to do unless you have a full day or your park tickets would be wasted. . You also have to be staying at AKL conceirge to book it.
This will be our first time enjoying it, but there have been wonderful comments about it on the other boards.