In article gers.com,
David Megginson wrote:

4. How flexible is customs and immigration in Philly? Are they easy to
work
with? I can always land and clear U.S. customs at Watertown or Syracuse if
Philadelphia is going to be a pain.

Call PHL Customs directly. These are little feifdoms, they have their
own "local" rules. Be sure to ask for a badge number and or initials of
each person you talk to and log the date and time. Keep it with your
flight gear.

Thanks -- I'll do that today, and will call again on the day of departure to
arrange a time.

The last thing I do, after receiving my clearnance on the handheld and
before starting the engine, is call the destination customs office and
give them an updated time of arrival.