drive like me and you could do it in four. fill the tank before you go and you won't have to stop (which you generally would in baker, but mind you gas prices are about 35 cents higher than they are in vegas simply because they KNOW you have to stop) . but a stretch of the limbs would be good. plus you can buy some "alien beef jerky" at this little ufo themed place that's really great amusement...
if you rent a car to do the drive, take some cd's and you're all set.