Ruth,
You are right, many (most), landowners sold off their mineral rights years ago. That was the case for a lot of the land we looked at. At first, the thought of "free gas" seemed attractive since we wanted to be off grid but, after seeing how the gas companies disrespected the land and made such a mess we decided against that arrangement if at all possible. We found a beautiful, mostly forested piece of land that still retained it's mineral rights.