Living/riding around 'Vegas, every time I want to do exploring, I inevitably end up trying to grind uphill in a loose gravel wash, or sliding around on golf-ball sized marbles. This is exacerbated by the fact that many of these roads are frequented by ATV/UTV's that constantly "fluff" the gravel.
So..I'm planning out my next bike build - a fat tire bike (Puglsey or similar). I've seen lots of accounts of performance in snow and sand. I guess my question is: How do the fatties perform over this loose gravelly stuff?