Hi, all. I've been reading since the first post and I really appreciate all of the input that's been offered here -- esp. the models that some have posted, as it made it really easy for me to follow along. Thanks to everyone who has contributed.
We were originally supposed to be at Disney from the 10th-17th, driving from Arkansas (first Disney trip, and first family vacation). But yesterday we decided to drive to Atlanta tomorrow (Friday) night, stay there, then get up around 4 or 5 am and head to Orlando on Saturday. I was able to get a room at Art of Animation for Saturday night and felt better knowing we were going to be on site when the storm hit. Then I saw that latest model (knowing that it's not any more definite than any of the others, just a possibility) and I'm pretty sure we're not going to go. We're driving with two kids, one who is terrified of storms (someone else posted almost the same description, and I had to check to make sure it wasn't my husband posting!) and it just seems like there are too many variables involved, primarily the availability of gas between Atlanta and Orlando. We haven't decided for sure, but are leaning towards waiting and seeing if it seems okay to drive down on Tuesday and salvage some of the week, though it looks like gas is going to be a problem then. The likelihood is that we're going to end up scrapping the whole trip, unfortunately.
Someone waaaay back mentioned checking to see what kind of trip insurance your credit card offers, which was very helpful to us, as we booked through the DVC Rental Store for the first half of our trip and Air B and B for the second. I assumed that all of our money was pretty much non refundable, based on the strict refund policies of both companies, but upon further investigation, it appears that our credit card insurance will pay for the DVC Rental Store purchase as long as the airport closes (so many, many thanks to whomever posted that tip) and Air B and B does have an extenuating circumstances waiver which will cover our Air B and B stay (I just confirmed with a phone call). So we feel a bit better about the monetary side of things, at least. If you've booked through either of those means, you might want that info.
Sending all good wishes to those who are making the trip and especially to those whose homes are in the path of this storm. Still holding out hope that it will take a far less destructive path and everything will be okay for you all.