I must be living in the dark because I didn't even know this was there. I just saw it on allears. I assume it is table service and reservations are required?
Yep - it's TS and reservations can be made in advance, or you can walk up as well.
It's also outside the park entrance, so you can dine there without having AK park admission.
And you're correct - they don't take the dining plan.
Yes, for the AK one - as long as it's not same day for Rainforest Cafe. That one and many of the DTD restaurants that take walk-ups can't book same day.