Michelle,
Thanks for asking your question to planDisney!
If your goal is to try your first-ever Thanksgiving-style dinner, I can think of no better place at Walt Disney World to do so than the Liberty Tree Tavern! The restaurant transports you into old-world America, and the food is both plentiful and delicious.
Because the meal at Liberty Tree Tavern is served as an all-you-can-eat experience, where platters of food are brought to your table, you do have to pay for every member of your party, except those under 3 years old. So no, you would not be able to pay for just one person. However, they will bring you more of what you request. While you might have seen a lot of food in the reviews you have watched, the restaurant was likely bringing enough food specifically large enough for that party size. Also, the meal is designed with several choices, so while there may be more food than you would choose to eat, you are able to find your favorites and focus on those. I think that you should strongly consider still going to, even though they may serve you more food than you might require.
You can find out more about your magical vacation at
www.startyourdisneyexperience.com.
If you have any follow-up questions, please feel free to
write me back directly.
Have a Magical Vacation!
Doug