I know that Chai Lifeline will be there on Sunday (from 12pm – 6pm). They are not providing food but they did say there will be kosher food sold at the park, and there will be a Sukkah on premises.
I heard NACHAS of nachasmusic.com is giving a concert at The Holiday Inn Center City by Dorney Park Sunday Night of Chol Hamoed. I heard him by a bar mitzvah and he’s very good. Very good at getting the kids into in. Should be a fun concert