Day time in Vegas is not glitzy it looks like any other city bleached by the hot desert sun but I am willing to bet when it goes down and the lights come up you're going to be like a kid with a shinny new penny all wide eyed and gobstruck.
In May we drove (car, there were 2 non riders) to the Hoover dam then up along the west side of the lake. Keep going until the clock says turn around.
