The Springs is the LAST stop on the bus, so if you want a guaranteed spot, I would either walk to GrandStand or Congress Park, or move your request, which is only a request.
We have requested Congress Park every year, due to its close proximity to DTD and the bus isnt packed yet.
Only 1 year did we get Grandstand when we asked for Congress Park and that was because we rented a Grand Villa...I missed being close to DTD.
But, we were like the first ones on the bus.
Good luck
Kim