As to the crowds on the SJR, if you hang around the Kittie/Kiddie Pool you will have lots of company. I have found that if you hike downstream a ways, the crowds will thin out, at least that is my recollection of condtions about ten years ago. I'll be there in a few weeks and I may be singing a different tune when I get back.
I plan on fishing the lower end of the river this time.
If you're coming in a few weeks it will not be as busy, and it's always less busy down stream from T-hole. So you will have less stress for sure! Haha