Storyland is fabulous and you'll love it there. Contact the North Conway Chamber of Commerce for places to stay. I believe there is a Storyland hotel on the corner just before you take the right to get to Storyland. You also may want to consider Santa's Village. That too is in NH though a couple hours north from Storyland.
Also in Lincoln (across the Kankamankas Highway) there is Clarks Wild Animal Farm. The specialty there is bears.
It was (many) years ago that we took our two boys and loved every minute of all of these attractions.
Have a wonderful time. But like anything else book into a hotel/motel early. That's the busy season.