I remember talking to the one of the guys from Michigan who were in the pics of XOM at the last Harlan ride we went to. I'm pretty sure it's not a "trail" at all. I may be wrong. I don't know that place that well. I can find Rattlerock from two different ways and that's about it. LOL.
I know this will sound funny, especially since I live 10 minutes from it, but none of us go to Windrock. :****: Out of all our friends here...I couldn't tell you the last time they rode there either. We noticed when we first moved here that riding in Jeeps, trucks, buggies, etc really cuts back every year there as ATV's, UTV's, etc are taking over. Kim and I drove my Jeep there just to check out the windmills a couple months ago on a Saturday. The parking lot was half empty and it was 99% ATV's. We saw one group of Tennessee Jeeps (CJ's and YJ's on 44" Swampers and near stock wheelbase.) Other than that...we were the only Jeep on the trail.
Some weekends we'll see 10 or so buggies roll into town and think there must be a ride put together on the internet or from a club. Mostly every hotel is covered up with RZR's and 4 wheelers every weekend though. If we see a buggy, I'm like, "hey, who is that?" LOL.
So, I'm not much help on that question. I agree...the waterfall looks badass.