ATV in Souther Nevada (Las Vegas/Henderson area)?

[jdub]

I was hoping that someone has been on one of the ATV tours in or around Las Vegas. I have some friends coming in from Chicago and want to ATV and there are a lot of rental places and some tour packages. If you have taken any of the tours either up in Mt. Charleston or any of the lakebeds I would like to hear if you liked the tour and what company you used. Any info that you provide would help.