$6 per night in valet - but it is good at any other resort (take your color coded receipt) for that night as well. If you are staying at AKL parked in valet - and take your car to GF for dinner - you won't be double charged for the same night. (Tipping is expected at both resort, however).
It was a really great perk when it was free. We used it at ALK this last trip too (not free) and it was really nice not to walk out to get the car in 96 degree heat. We'd call for the car and it would arrive with the windows open and AC running.
-LA