Googling led me to this page where the author had the same problem, and they found a solution in Safari Bookmarks Extractor. I can't test that it still works with version changes in both, but it probably does. Once you have your extracted bookmarks, you just use Manage Bookmarks -> File -> Import -> From File.
I grabbed a reservation and then cancelled it, because there has to be a catch, right? I have 8.1 I wouldn't mind upgrading, but I wasn't sure if I had some kind of better agreement since I paid for 8.1.