How long are you going to be gone? What is her usual schedule? Are you flying? If you are going to be gone for a short time, you could try to keep her on her same time zone. For instance, if she usually sleeps 9pm to 9am, you could put her down at 6pm and expect her up around 6 am. That can be hard to pull off, though, because it is usually not worth it for the adults (getting up that early). Most likely, she will be tired very early the first night (compared to Pacific Time and compounded by the travel) and will wake up earlier than you want her to the next day and subsequent days. Gradually she will adjust to the time zones both going and coming. Just go by how tired she is and not by what the clock says. She won't know the difference that way.