Spring Gulch is nice if you choose the Lancaster area, don't know if I would want to spend a month in that area though, not a heck of a lot to do. You may wish to consider Long Island NY - although may be difficult to get a campsite there. You have some of the best beaches in the US and easy access to NYC if you choose to visit. plenty to do there. Rehoboth Beach is a great area to visit - beaches, shopping, restaurants, etc. When we visit there we stay at Delaware Seashore State Park, it has a walking path right to the Atlantic Ocean and is close to the boardwalk and also not far from Ocean City Maryland. Lake Placid area is nice as well as the Lake George area.
