Welcome to our Forum, theglahns.
Yes, your best bet is to try recovering the backup save file, either the way Salty described or by using the instructions on the link she provides. Also, just so you know, traveling is known to be quite buggy at times, so always be sure to save right before your family leaves for vacation. It's also a good idea to have multiple copies of your file by using "Save As" and giving it different names, such as Game Name A, Game Name B, Game Name C, etc.