I just finalized all my travel reservations and made a discovery that might be of use to others.
I am taking Amtrak down to the area from Providence early Friday morning. When I travel on business to NJ, I typically get out in Newark, NJ, walk across the parking lot, and rent a car at the Enterprise location across the street.
I looked this morning for Enterprise locations closer to the convention site and discovered that, if you get off at the MetroPark Amtrak station in Iselin, NJ, there is an Iselin Enterprise office that will come and pick you up at the station. The cost of renting a car? $32 per day. MetroPark is ideal because it's served by Amtrak (including some Acela's) and NJ Transit. It's also about 12 miles to the convention.
So, I'll get off the train at MetroPark, Enterprise will pick me up, and I'll be at the convention in a car that's only going to cost $32 per day. I can work on my laptop on the entire ride down and back and not feel like I've lost all that much time from work.
I hope this helps someone else coming from outside the area,
Steven J. Serenska