As far as I know, Ay only has his blitzing feats with his cloaks on. If they each start in base, with full intel, I don't see why Kakashi couldn't be quick enough to escape (especially with smoke cover or something). Unless there are feats for Ay without cloak blitzing, or activating his cloak instantaneously (I honestly don't know).
OT: I was thinking about it some more, and I think that full intel Kakashi could win. Ay is definitely fast enough to avoid Kamui, since Ama and Kamui are comparable in speed, but the problem is that he only avoided Amaterasu head-on, knowing it was coming.
If Kakashi hides, he could snipe Ay from an unexpected angle, which should work. At the very least, if Ay can react to it, he could set up chains in the ground, create a Raiton Clone as a minor distraction, or even use Dog Summons to give him that split second he needs to get Kamui off.