Yeah on the conservation area, I just parked back by the trail and headed on in, you can also access it (on their ground) from browning road, near the archery range and off 150, after 150 it turns to private property. There are definitely fish, the ones I was catching weren't that big but it was a short and unplanned event, I just had a rod and a couple of jigs.
Where is a good place to access the Little Blue (preferably near Longview/Lee's Summit) ? Sounds like fun.