Yes; they have different parking facilities. The tournament parking being much more limited.
Yes, different locations although they share some space outside of Citifield
Under Northern Blvd overpass is generally available
Yes. Citifield parking is separate
Yes sir!
Post your answer publicly Yes. There are bus shuttles that take you from the Blue or Orange zones to the East gate. The shuttles are pretty frequently run. I was there last night. It took 1 hour (from 7-8pm) to get into the parking lot from College Point Blvd. I had to miss the beginning of the night session.
Yes
From the US Open site: "When there is a New York Mets home game (known as a Conflict Date) guests will be directed to park in BLUE ZONE PARKING and ORANGE ZONE PARKING as directed by NYPD and parking lot staff."
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