Looking to head to NYC for the weekend and catch a day at Bethpage for the PGA tournament.

1- What's the best way to get from Manhattan to the course? Apparently there's a train that takes you right to the course? Although the tournament website says to get off at the next stop, and they have a shuttle service?

2- What are the best locations to watch the action, likely going on a Sat or Sun.
Ideally like to see them from t-off, and spots to get close to them as well.

3- Thinking of driving most of the way, then leaving the car somewhere and taking the train into Penn or GrandCentral. Any ideas?

4- Any other tips while at the course? Would be my first time there.