I think as long as you attempt to hit a few stores like Walmart, Target, Toys R Us, and Best Buy on Sunday morning, you'll be able to score at least a Basic set. Of those four, only Walmart has advertised having Wii U in stock that day, so you may want to start there first. If the Wii U is going to become difficult to find, it's only after the first wave of media coverage that describes the initial sell-out - people want what they can't get!