We like Yuba lake as well. Our favorite thing to do is camp out on the beach during September when the beach is less crowded and the weather is still warm.
We live in Utah county and for a day sail, it's easy to pop up the canyon and sail on Deer Creek. The canyon winds are almost always blowing for a guaranteed great day of sailing.
For more info check out our posts about Utah Sailing.http://GetWetSailing.com
Here's a video of us on Deer Creek.
It's A Great Day To Sail!