Attached Link: What Is My IP

I don't know the answer but the folks at the What Is My IP forum can probably help. They're pretty savvy on such things. You may not have time before your trip but perhaps for future reference.

The only thing I can think of is that since you apparently have to open a port for remote WOL, you might be able to set up a rule in your firewall to only accept a connection on that port from address xxx.xxx.xxx.xxx. That might work, the big problem being you'ld have to know in advance what IP you'ld be coming in from. If you're using some kind of WOL web page service, maybe you could get that info.
   

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken