I don't know if you have round trip transfers ($50 for two transfers I think) or are just taking it from the port to the hotel ($25 I think).
You might want to schedule a town car service instead. You can look on most sites (Tiffany Towncar, Happy Limo, Florida Towncar and Your ride) to get an idea how much it would be.
I'm not sure how much luggage you have and it would probably be a huge inconvenience, but perhaps you could have the bus drop you off at one of the hotels that it does go to and take one of the regular WDW buses over to the All-Star. I don't know that if anyone has ever done this or if the driver would say anything.
Personally, I'd look into the towncar service. Have fun!