New to the island

We just moved here this summer. I'm working on trying to figure out long island and things to do with my family. Typical things like finding doctors and shopping are all par for the course. One of the biggest shocks I had was when we were in August and had already received information for our 2 and 4 year olds about camp for the summer of 2013, definitely a shock. We hadn't even begun school and we are already getting information about next summer. I'm wondering what are the best options for full day camp programs in Nassau County on the North Shore.