If it is evening, you could always bus to Springs, bus to Riv. We use Riv as a hub quite often since it doesn't include security inspection like busing to a park.
I would go to MK and take the Riviera bus from there. Taking the Skyliner from DHS is fun, but just keep in mind, you will have to get off at CBR and transfer to another Skyliner car to get to RIV.