What is open on Christmas Eve and Christmas Day in the area for Christmas?
Most everything will be open Christmas Eve, but a lot of places will close early. There are a few restaurants open on Christmas Day like Applewoods Farmhouse,I think I saw Paula Deens will be open most of the chains and fast food will be open. Some attractions will be open. I think Ober Gatlinburg will be open, Wonderworks and maybe some Ripley attractions. Best to call and make sure before you head out.
I put a link below to restaurants that were open/closed for Christmas. It's last years list but may help.
Make reservations for dining out now. Places will be very busy.