Copper Cactus Ranch
Have friends that go on a regular basis and love it!! We haven't been yet either. Hopefully will go this year with some friends! Visit their website, you have to buy a membership (a very reasonable $25 per year) they keep adding more and improving the roads. It's looking really beautiful. They also have a Facebook page if you're on Facebook... very interesting and informing.
Late to the discussion here, but wanted to add my two cents. I visited in October and was really impressed with what these guys are doing. It's still a work in progress, but it's clear that progress is being made. The roads to get there can be kind of rough, so consider taking a larger vehicle rather than your smaller car. Definitely worth a visit for the day at first to get the lay of the land, then determine if you want to book a longer stay in the future.