I got the opportunity to explore the Randolph ORV area this past Saturday. I have to say I was really impressed and had a GREAT time on the KTM 450 EXC!
I had heard about this area for a few years but always got the impression that with it's focus on rock crawling and 4x4's, it had little to offer motorcycles. Yes it is a 4x4 focused trail area (those poor guys have even less places to play than we do), but we found plenty to play on for many hours. We were there during a Kansas Krawlers event--so it was very crowded with people parking out on the side of the road because the lot was mostly full. Even with that crowd, we were able to ride in areas without any congestion. Plenty of hill climbs, valleys, dry creeks, woods, rocks, bluffs, etc. to play with. Of course there are also rock ledges for the rock crawlers that only a good trials rider could think about riding on...but the area offers so much more than that.
We did see a small number of other motorcycles and ATV's there but rarely met anyone on the trail.
We did not find any singletrack, but there is some quad track. Most of it is of course 4x4 wide. Don't let that scare you away--it gets plenty technical, as technical as you want and more I'm sure.
I'll say I liked it a lot more than Perry and probably not as much as School Creek, but close.