Difficult fishing...
Eagle,
Keep in mind that the Squan reservoir does not have a lot of access from shore. Aside from some spots on docks and a coupld of dikes/dams, it is much better accessed from a boat. I was also recently "yelled" at for wading. Apparently that is a no-no there. Ridiculous!
That being said, I was there on Sunday futhering my fly casting abilities. If you park at the ecology center and make your way down the path, you will come to a nice clearing by one dike/dam. You have plenty of room to cast, but have to be careful of people walking, running and riding bikes behind you. As a novice fly caster, I came close more than once.
Have fun.