Flight
The best airport to travel into is the Philadelphia International Airport (PHL). It is an American Airlines Hub so that might be your most convenient option The Hotels are ~20 minutes from the Airport so it is a reasonable Uber/Lyft ride Given the hotels are in the city, parking will likely be expensive so renting a car may not be the best option If you are trying to do sightseeing, the Marriott is a 13 minute walk from the Liberty Bell and an 8 minute walk from one of the train stations that can easily get you to other areas in the city
Hotel
Primary Hotel Shuttles will be to/from this hotel and afterparty will be at this hotel
Hotel
Secondary Hotel (5 min walk to Marriott, but it is across a busy street)