Ohana is SO worth mixing up your plans for! I'm don't think that the mac n cheese hot dog is still at Fairfax Fare, though. I know when I ate there a couple months ago, I didn't see it on the menu anymore.
Ironically, I just yesterday completed the Dining Report for my most recent trip, Dec. 2015. Here's the link if you're interested:
Click Me!
Food & Wine is AWESOME! And yes, I used up all my Snack Credits on it, hahaha. I went out of my way to try to spend them on the more expensive food items!