About 15 years ago a buddy of mine and I took his folks down the Poudre below Filter plant on sit-on-tops - dumb idea, because as many of you know, there are a nasty diversion dam with deadly 3' aerator concrete teeth at the base of a 6-8' slide.
We came around the corner and saw it, and my friend's mom freaked out, tipped and swam. We were able to get her to shore before the drop, but had to get onto some old dude's private property. He comes running out, red-faced and yelling, to get off his property. We told him sorry, but we had to trespass because of the safety issue. He said "I don't care- get back in the water and go die in that dam!". Dude was apoplectic - I thought he was going to stroke out right there, he was so angry. I also have no doubt that if he had a gun, he would have shot at us.
Believe me, it took every amount of constraint we had not to break that guy's jaw for trying to make a 50 year old shivering woman get back on a boat and float over a death trap. We quickly portaged the dam with him yelling at us, and we did have the sheriff waiting for us at our takeout, but he didn't cite us or anything. It was one of the few times in my life that I actually felt the I wanted to kill someone.
So don't go boating down that section of the Poudre thinking you'll get a I-II float. I can't imagine that guy is still alive (and yes, I hope his ticker did blow up, the evil fuck), so maybe the portage issue isn't as volatile, but it isn't a worthy section regardless.