House Or Rental
I reckon this (or Homeaway, or any other local beach rental company) is your best bet for finding a place to rent with large groups of people. Beloiters and high school friends, I have delegates who've accepted the responsibility of organizing all y'all (Ethan for the BSFFA alums, Izak for the non-BSFFA Beloiters, Tom for the younger BSFFAs and recent grads, and Liz for the high school folks), so be sure to get in touch with one of them if you'd be interested in renting a property with folks for the week or the weekend!
Hotel
It's a Holiday Inn. Pretty much...what you would expect from a Holiday Inn. Within walking distance of the beach, and it's big and rectangular and shiny.
Hotel
This is a pricier place than Holiday Inn or any of the rental places, but it's right by the beach and each of the suites has its own kitchen.
Flight
This is the nearest airport to the house (around 1 hour away), though Philadelphia Int'l Airport (around 2 hours away) has more flights, and is less likely to be delayed/cancelled due to weather.