I've jeeped up this trail several times, and I've also ATV'ed up this trail.
Sometimes this road is VERY rough, so jeeping it beats the crap out of you. It's often faster to ride 4 wheelers up there too. Wear a helmet though, lots of accidents happen on this trail!!
You start up the trail in Mantua, just East of Brigham City.
Here's a couple of pics from the jeeping days.