Easy to get to Wal-Mart!
Go out of the main entrance to Pop and take a Right on Victory Way. Take a Right on Buena Vista.
Go down and take a right on-ramp to EPCOT Center Drive, it becomes Fl-536. There is a BIG overhead sign on Buena Vista that says (TO: I-4, 536, Toll 417 and a picture of a Jet for the Airport) (Thanks go Google Maps)
Take 536 to 535 and take the right. Go down about 2 miles to Wally World. It is on the right. They usually have cheap gas there to!
If you need more help, PM me!