I think the best idea at that time of year is to just keep an eye on the weather forecasts and be prepared to be a little flexible in your travel plans. We always build in a few extra travel days along the way that we can shuffle around before we reach any place where we have hard reservations. One of our last non-reserved stops before Florida is in an area we really like, so if we have a couple of extra days left when we get there, we don't mind staying there a little longer.