Get up before 7am, of before 830, you can board. Not much of a wakeboard place.
Hit one of the many bars, casino, sand bar, or drive up to the dam and just drift down. That's about the only things worth doing at Parker. I used to take a week or more a year there, but the place is just so crowded even mid week, weekend I didn't even bother. We stopped going this year for the first time in 20 years