Hi there mko72, as other's have already said be very careful where you go and always use a 3 touch climbing and descending method
at all times. Meaning 1 hand holding, 2 feet solid, one hand reaching. Or 2 hands holding, 1 foot solid and the other moving. Be slow and cautious, not quick and careless. This river is beautiful but to enjoy it you have to get there safely, no fish is worth ending up a paraplegic and in a wheelchair for the rest of your life.
On a more upbeat note I had major knee surgery a year ago and although my movements are slow and clunky, following what I've written above has brought me to some of the more dangerous parts of this river's canyon many, many times in the last few months.
I also could tell you where my preferred spots are but it would be a fool's folly because everybody and their dog would be there before I logged off my computer.
No, the best advice I can give you is, play safe and hike with your head, not your feet. Just because you find that sweet spot it still doesn't ensure you'll catch any fish, to that I can surely attest too. Do by all means get out there, all of you !!! What you'll find is truly worth the long hike, the next day's soreness and the boredom that goes with long stretches with no fish. Enjoy this planet's beauty, take some long deep breathes and be patient and happy and when you do get a bite and a fish, it's a bonus.
Have a Great weekend Everyone. Good Fishing All !!!