As devastating as the water will be on the Florida Panhandle, keep an eye on TN between Chattanooga and Knoxvile. You have no idea what a foot of rain can do in the mountains.
Camille's death toll in 1969 was highest in Harrison County, MS, but second highest was in Rockbridge/Nelson/Amherst counties in the Blue Ridge of Virginia. The storms get stuck on the mountains and rain themselves out.