I believe they are at the character breakfast at Storyteller's Cafe in the Grand Californian. I haven't seem them in the parks, but I don't look for them either.
We have seem them at DCA near the Redwood Creek Challenge area. They used to do a little show, not sure if they still do. Just FYI, they do not sign autographs.
The show is gone. But the Meet and Greet with Koda and Kenai was still taking place second Monday in November at the entrance of the Redwood Creek area (past the turnstiles, at the sign), although it wasn't on the DCA schedule anymore.
We bumped into Koda by chance when he came out from backstage and he motioned us to follow.
It was really cool. My friend was wearing a shirt from the TV show Firefly. Koda noticed and got all excited, including jumping up and down, clapping and several bear hugs.
Then he wildly started waving for Kenai to come over (he arrived a couple of minutes later) and the same game started with Kenai. They kept hugging us forever.