MK--On the "porch" with two rocking chairs in Frontierland. It's actually a platform, which is nice for the little ones to be able to see. It's across the street from the Turkey Leg vendor and down aways. I think it's near a candy store.
MGM--In front of the Brown Derby there is this round shaped patio area with benches. You can stand on the benches and look over the 1/2 wall to see the parade.
Never been to AK parade.