I've been wondering about where you are located.  I never was on 20 or 29 until this spring hauling four loads of seed potatoes off Duck Creek about 7 miles into WY on 20.

That is a pretty good pull out of the Niobrara and the fossil beds going north.  I was glad to be headed south loaded, but the pick-um-up trucks following me never appreciated me starting down the slope at about 35 mph.

Is there much to see at the Agate fossil beds?  I thought it might be a nice day trip in a four wheeler.