Sooooo this new brooklyn heights park, right?

Ha. ( ^ amusing new little feature here)

elgoats, Just about every single subway line that goes into lower Manhattan bottlenecks in Brooklyn Heights not too far from the park.

That includes the 2,3,4,5,A,C,M, and R trains.

And the ones that don't have direct access like the B,D,F,G etc, have easy transfers nearby to the ones that do.

Seriously, check the map:
http://mta.info/nyct/maps/submap.htm

And there are a ton of busses from all over Brooklyn that drop nearby, or even a few that go right there.

Hence Modsquad's response above.

Parking near the park is nearly impossible. Or expensive, in a garage.

You are much better served via public transit.

guilty as charged...

(now cranking tune)