x2 on the car service.
Central Parking has been virtually inaccessible for the last couple years in my experience. Even if the signs all indicate parking is open, they are always re-routing people inside to the economy garage or worse.
Even in the case of a same day turnaround I've ended up in the e-garage. The e-garage isnt too bad and would address your snow issue, but I always inevitably miss the shuttle as i walk out the door and have to wait 15+ min for the next one. Its a pain.