I haven’t noticed a slow bite either. I’m no expert on the river, but I’ve been finding fish and catching them on each outing. The one thing I’d say is you need to find the bottom and keep contact with it- not see easy to do in high water with fast current. Let out more line and use heavier weight. This past weekend I would use nothing less than 3/4. 1oz was better though.
Also, regarding the boats and the crowded spots, it’s just the river in the Spring. Relax and go with it, talk to the people out there. Ask the ones you see catching fish what they are doing, they will usually tell you. If they won’t then just watch them for a while, more than likely at some point you’ll be close enough to them to see exactly what they are doing!
I love this time of year, with the crowds and all. It sure keeps things interesting!