This happened to us in February 2018 at the GF. ME bus to the airport never showed up with about a dozen people waiting. When the next ME bus showed up a half an hour later, it was a drop off from the airport. That driver radioed in to let the dispatchers know that our bus never showed. Dispatch had him load us up and take us all directly to the airport.
It was nerve wracking to say the least. We did make it to the airport in time, but then our flight was canceled with nothing available until the next morning. We ended up booking that night at POR (online) and heading BACK to ME for a ride to the resort. From there we had to go to the front desk to arrange our ME transport for the next morning and get our letter printed out, which for whatever reason took almost an hour. I sincerely hope we never have that many ME adventures in one day again, lol!