Should be ok, I just found this:
"Some of these roads might not be labeled so use your odometer. All of the roads mentioned are either paved state highways or well graded dirt roads; a high clearance vehicle is not needed for any of these driving routes. Make sure you have plenty of gas as the closest gas station is in Baker, Nevada 40 miles away."
So even if it is dirt, as long as it isn't like 10mph dirt, I'm good. And after seeing this photo:
http://www.summitpost.org/images/original/149761.JPG
I think we will definitely take this route, its looks pretty cool and besides, I like to take back roads....
Bart