Does Southwest provide bags for car seats (to prevent them from getting dirty). I know you can buy car seat bags on amazon but I don't know if I'll receive the bag in time if I order it so I was wondering if anyone knew about this as I heard some some airlines provide big bag (similar to big plastic garbage bags for people checking in a car seat). I also saw the page on the Southwest blog about the reusable bag that Southwest sells for strollers and car seats. I'm just looking for info if they provide a disposable bag at the check in counter.