Lynn,
Make sure you study up on the different types of palms, which I know you probably will. Here is a link to give you a little info on the hardiest types...
Here is a quick reference:
http://www.sepalms.org/Hardy%20Palms..._Reference.htm
Here is a little more info on cold hardy palms:
http://pubs.caes.uga.edu/caespubs/ho...almreader.html