Looking for NE and Mid Atlantic Suggestion

Hello All... I'm bringing this thread back to life as we need to nail down some reservations. We have narrowed our trip down and I would like to hear from you all to 1- see what you think and 2- make suggestions of changes to our plans. We will be leaving Wed 7/30 and heading to Promised Land state park for 4 nights. This is the only part that is not open to change as we are meeting family there and we love Promised land. We will be pulling out on Sunday 8/3. From there we are planning to either head to the Lake George area or the Watkins Glenn area. If we go to Lake George we are thinking of going to the new MooseHillock park. The sites look huge and the kids will love the pool. If we go to Watkins Glenn we are not sure where we will stay as it seems like the state parks are pretty full already, but this area does seem to be beautiful. We are also looking at Letchworth state park.. From there we would leave and head back down to PA to spend Thursday-Sunday at Worlds End state park and then home.

What do you think? Any suggestions or changes I should consider? Is worlds end a good choice for 4 days? Thanks again for any feedback!

Kevin