Craftymom,
I don't think it is. We have Costco here too. Big Lots isn't a membership warehouse. They buy overstocks from other stores and have a few re-conditioned things. You can get Halloween and Christmas baggies there right now. They do have seasonal things in the correct season too!

They have more than food.... like kitchen utensils, toys, health & beauty, cards, and some places have furnature amoung other things too.