We've done Yak & Yeti for dinner once, and it was OK. We'd do it again, but we usually leave AK early (or right at closing), and have a 6:30 rezzie at a resort other than our place. This year, it is our Chef Mickey's night.
If you are concerned about the spiciness, try our option of a hotel restaurant. Maya Grill at CSR is close by. (Well closer than some.) Boatwright's at POR, is good too. Or you could venture forth to a deluxe, and try Ohana at the Poly, or 1900 Park Fare at the GF.