Yes, it is. Here are the dining places open during HHN:
Cinnabon, Confisco, Cafe 4, Captain America, Comic strip, Wimpy's, Pizza Predattoria, Burger Digs, and Fire Eater's Grill. On peak nights, Monster Cafe will also be open.
It is? I just copied exactly what was listed on the employee hand-out information sheet for HHN and Enchanted Oak wasn't listed. I sure hope it is because I love eaing there. I know it was open two years ago for HHN and we ate there then.
Enchanted Oak was open Saturday night, at least--I imagine it will stay open, being the only (permanent) full bar in the park besides Confiscos. Alcohol sales clearly make up a big chunk of HHN profits.