Google says it is a 8 hour drive from Vegas. About 470 miles. You have to figure it is a 2 day trip. One day to get there, and leaving time to look around, another day back.
Plan on a LOT of open country between Vegas and Crescent Valley. Nice country, but not much in between the few towns along the way. You may consider catching a flight to Reno and driving from there.
Don't take my word for it, Do your own research! Then you will know it's true!