I can't help with dining out on Thanksgiving or Christmas but I can offer some holiday entertainment ideas.
Christmas in Hershey offers a variety of entertainment options, check their website:
The American Music Theater in Lancaster has "Home for the Holidays."
Allenberry Resort & Playhouse in Boiling Springs is doing "A Boogie Woogie Christmas."
The Central PA Youth Ballet does several performances of "The Nutcracker" at 2 venues.
The Dutch Apple Dinner Theater in Lancaster has "A Swingin' Christmas."
The Harrisburg Symphony Orchestra will be doing "Mistletoe Magic" on December 8 & 9.
This is just a sampling for the many holiday events in the area.