Thank you so much for the link and tips. I was getting discouraged because nobody gave any input for over two days since the original post. Hopefully, all you guys were out riding and not sitting in front of a computer.
Early morning won't work very well as there is that pesky conference I need to attend. I'll be sure to carry plenty of water, at least two 25-ounce bottles. Need to map out the mileage, but it looks like one day on Blue Diamond, another on River Mountain Loop Trail and the third at Red Rock. Don't really want to drive the car to a trailhead, so I'll just cycle from the hotel/resort. Thanks again for the link. Their regional map gave some decent ideas.
p.s. Got the senior lifetime national park pass. I'll be sure to carry it with me.