All of my dogs have always woken up really early on the weekends because they were used to waking up early on the weekdays. THey usually slept about 1-2hours later on the weekends, but it was still too early for me. Since someone in the house was usually up, I would just open my bedroom door for them to go out of my room, and whomever else was up would take them potty..I would go back to bed
Rocky's pretty good about sleeping in on weekends, and weekdays! A couple times a week he'll wake up at like 9, but most of the time he sleeps until I wake up. I got lucky with him!