Rob, you were there too?!? Apparently everyone I know from this site was at a golf course in the middle of nowhere Kansas the same time I was and I didn't see any of them. I was there for the day on Friday.
I snapped a photo of 12 tee, just like everyone else who has ever played there:
The trees on 12 are... INTIMIDATING. I hit what I thought was a perfect tee shot - a 3 wood that I smoked down the center of the fairway to 100 yards. That one lowish hanging branch from the right side shouldn't have been in play from there with my low wedge ballflight, but it got in my head and I hit the approach a little thin and over the green as a result. Are the trees necessary? No way. The hole would stand up just fine without them. But they definitely get in your head on both shots, while still being easy to play under, over, or around if you plan wisely. Aren't they exactly the type of hazard we extol the virtues of on this site? Visually intimidating, more difficult for the strong player's high ballflight and long drive than the weak player's low ballflight and short knock, with plenty of room to play around or under.
The trees on 14 are... BEAUTIFUL and make for a lovely green site. I might feel differently if I visited when the seeds were dropping, but one of the joys of Prairie Dunes is that it's so blended with its natural environment, and an unusual environment at that. It's less of a golf course in the prairie than it is a prairie with a golf course. As such, the way it moves from one piece of the property to another and melds with its landscape is one of the unique joys of the course as compared with others. Playing back into the cottonwoods at 14 is just one of the ways that the variety of landscapes is embraced by the routing.
The trees on 15 are... OBVIOUS. Imagine Prairie Dunes without a routing - you and some friends have been dropped off at the property with clubs and balls. To make things plausible, let's imagine that the native has all been bushhogged and mowed to a playable height, but there are no fairways, or greens. You're given a few flags and you get to pick your own tees and targets as you go. Wouldn't someone immediately suggest teeing off through those trees on 15 to a target tucked roughly where the current green is? I know I would.