On the Gazeteer look for a trail coming from the south that intersects the river at Crosson's Crossing. I've always approached this from Bailey by continuing down way past the put-in. Gazeteer will show you the way. It's gated up kind of high (if you see a huge diameter steel pipe gate you're in the right place) so it takes an hour just to get to the river, but once you're there, start hiking upstream to see the rapids. Hike on RIVER LEFT where there's a trail. There are signs up river (several miles) when you start getting close to four falls that indicate private property. Don't bother scouting down river from Crosson's as that's all pretty easy boating. Take your fishing pole if the water's low. It's okay fishing, but not great.
If you want to go with me sometime when the water comes down, I'd like to clean out some debris and I'll show you the rapids. It has to be really low though for me to make a cleaning mission worth it (<100). That's COLD water.