Philles is right, lol.
Even if you gave out SF codes they wouldn't be able to TP to your estate. Unless you have family staying home, and I'm sure they don't know how to play (not to be mean or specific). In order for someone to do that they need your password, and to give your password + username out on the internet is not a good idea (to anyone).
I hope you have fun on your trip, and that your garden stays healthy
