You really should take a look at SAFT. It's a safari plugin that enables a TON of things. You can save/load a particular "session" or browswer window with multiple tabs. Say you hard shut down, or safari crashes or the power goes out. When you launch Safari the next time, SAFT will ask you if you want to restore the web pages that were up before hand, and you can even pick and choose if you don't want all of them with the simple click of a button.
SAFT makes Safari Godlike.