After looking at many options, I have decided that the best path forward for our Forums is to partner with ParkFans.net. They already have an active forum which primarily focuses on Busch Gardens Williamsburg and Kings Dominion, but covers parks around the country and around the world as well. They have always had active discussions of Great Adventure, and welcomed our members to become part of their forums.
https://parkfans.net/threads/welcome-greatadventurehistory-com-forum-members.7998/
I hope everyone will join me there!