The weather should be nice out here. It will still be cool in the mornings and then warm up in to the 70's. After the sun drops, it will cool down quickly. Elevation change will change the temperature quickly. Las Vegas sits at about 1500 feet. To get out of Vegas, you go uphill and the temperaures can drop fast.
Make sure you have sunblock, chapstick, and carry some extra water with you, as it is extremely dry here.
We do have some of the worst drivers in the world as well. Drunks 24/7, red light runners, people that don't know that green means go, you name it we have it. Be careful and enjoy the ride!
Hit up the saloon in Goodsprings.