It's been a few years - so things could be wildly different. Which is why I said I'd look into it.
But I went for a jeep ride up into the south end of the Oquirrhs a while back and remember being both impressed and surprised at how much there was up there to see. Tons of roads that you could get a jeep or ATV on, but that most regular 4WD vehicles wouldn't handle all that well. And there's a ton of space between the Tooele side and the Utah/SL County side - especially towards the south end.
Just a thought.