Walmart does have a good selection of wedding things, too (selections vary on location, so take a peek at their website) & check the craft stores, too. I know AC Moore & Michael's have a wedding section. Don't be afraid to look around & ASK QUESTIONS!
You may get ideas from these websites on decor or favors for things that you could make yourself (or get help making). Just remember not to take too much on by yourself or you'll feel burnt out by the time your wedding arrives.