A week in advance minimum during summer
I booked three weeks when I made hotel resevations but on the morning one I did a couple bought seats on the spot and there was still a empty car for the morning run.
You have to keep an eye on their schedule. It books up quickly.
It's easier to book at least a week in advance.. sometimes you can get in there same day but advance booking is advisable.
Thanks! Your answer is awaiting moderation.