I personally think anyone in the path of that storm needs to evacuate, no matter what. pack up the snakes, pets, kids, exc and get the ___ out of there!
I would also do the pillowcase thing, if it didnt work well and keep stress low breeders wouldnt use that method. In the even we need to evacuate and were going to be stuck somewhere awhile I will transport in pillowcases and bring bins with me to set them up in while we wait. This way you can stack the bins together (hopefully you kept the lids) and call it a day. Hopefully you wont have eggs to worry about (talking about breeders here)
Good luck and may you stay safe!