if you are flying allegiance/sp, check with them on about the shuttle Horizons.
i read about this shuttle on the transportation forums.
a passenger stated they paid $35 for going from sanford to disney.
the shuttle does go to other hotels, not just disney.
also read that the above was the price when using the shuttle from 7 am to 7 pm.
all other hours had a higher shuttle cost.
i have not flown in to sanford, just read some of the threads about that airport in case i ever decide to go that route.