The WalMart is just down 192 (on the side of I4 opposite Disney) - it's a few miles down, but not overly far - it's maybe a mile or so past the intersections of 535 (which connects with the road coming out of Epcot - look on a map and you'll see it). I'm a really bad judge of distance, so I may be off on that. It is just after the Medieval Times Dinner Theatre on the right hand side of the road. If the construction on 192 is any better (it's been horrible the last few times I was out there) - it's pretty easy to get to and open 24 hours. We make a trip there every Disney visit. I don't know how many styrofoam coolers I've bought there and then pitched at the end of vacation.