Lurker popping in--I just saw this post, sorry I didn't see it sooner. I love Bennette Springs State Park! I wish it were closer to my area; we'd go there a LOT more often. (I'm near St. Louis, it's about 3-1/2 hr. drive for us.) I'm assuming you're going for the trout fishing?
I know they are in the process of re-doing the full hook-ups section of the campground. I'm not sure how much of that is finished. I haven't been there since it was started.
If you have any specific questions, I'd be happy to try to answer them. You've probably seen this, but here's the park's website. HTH and have a great time there!