The first thing I would do is to get the name of the owner and/or the address and check the property appriaser's office records to see if the taxes have been paid on the property (or if they are delinquent from years past). Also check to see if the owner has a bunch of properties that are in the same boat.
Here's the Prop App site (start at "Search Records"--3rd down on left side of screen):
Walton County Property Appraiser's Office
Also you can check out the Public Records to see if there is any Liens or Lis Pendens on the property or owner:
Walton County COUNTY RECORDS VERIFIED THROUGH Thursday, Feb 05, 2009. LAST CFN = 1067959 (v3.0.3)
Also try to Google the address to come up with the MLS number and read the property description...does it sound desperate or mention "short sale" or pre-foreclosure? Is the owner asking some "bubble-era price" for the place? (You can find that out by checking what he paid for it originally on the property appraiser site I linked above) If so, and if the taxes and liens check out OK, it will probably be rotting on the market for some time to come--so no worries there.
If everything checks out ok, then you'll probably be in good shape. You may want to re-check just a time or two leading up to your trip. But since it is up for sale (and if he's priced it to
actually sell) you might want to consider a Plan B, just in case. The good news is that you'll be coming during a slow time and you might even snag a better deal since some owners will be happy just to cover some of their expenses rather than leaving the places empty.
Best of luck.