Just curious - have you tried this???
Last night I had planned to get her up to go out at 4 (was going to try the set and alarm and gradually move it back trick). So, of course she woke up to go out at 2:30 instead. That made 4 seem silly so I didn't wake her at 4 and then, of course, by 5:15 she was up for the day. Once I'm good and up, around 7:00, she goes back to sleep of course!