The cache is well hidden and you MUST replace the cache as it is or it may be muggled or lost to the elements.
You should bring a pen of your own, although you may use the pen part of the cache itself while it lasts. The log my not be easy to replace in the cache so I advise taking the cache back to your car or a bench.
Parking may be found across the street in the co-op complex or in front of the Byrant Ave. gate to NY Pres. Hospital. I would not stay there tooo long which is ok because the cache shouldn't take long anyway.