A buddy of mine lives on Lake Houser and I went riding there years ago. It was nothing but a bunch of old fire/logging roads with really not much of interest for trucks. This was about the most fun we had there.
I will ask if they have added anything worthwhile. There are a couple more pics here, but some of this album were taken at Flat Rock, which I think is (really) closed now.
I finally talked to my buddy and he said they haven't really added anything for trucks. All he ever sees going in there are quads. I may stop by Richard's on my way to the Overland Rally and if I do I will take a look.