If you want to traverse Big Snow then using Foss River Road or Miller River Road are options to consider... then link that via Martin's route to Commonwealth/Gold Cr.
I've been skunked by the middle fork hike-bike-ski, but that was almost long enough ago to make it worth another try :
The road was severly damaged after the January 2009 flood. You can get to Dingford gate with ease again, but I don't know how the road is upstream of that. The mtb guys might know, since it's a nice loop from goldmeyer to taylor.