Hi
SlabQuest: I think the jumping/rolling fish saying is an old wives tale. When I fish the OP rivers I move from spot to spot looking for jumping/rolling fish. I can't count the number of times I've seen fish jump, role or porpose and have gotten fish. A lot depends on what the river is doing and how long those fish have been in the system. A few years ago I was fishing a hole with a friend from back east. We had fished the hole the day before and got nothing (river was up and fish were moving but hadn't made it up that far). The next day we went back to the hole. He got excited when he saw a few dark Kings (we'd seen them the day before) role. About the same time I saw some fresh Coho Porpose/moving. We spent the next 2 days in the hole banging on fresh Coho. And almost every time fresh/moving fish moved in the hole they rolled, porposed etc and one of us would get a least a strike.
As for the river flows, I think that affects the aggressiveness of the fish more than anything else. Even fish that have been in the system for a while seem to become more aggressive when the water is up and they are moving etc. There is a hole on the Solduc that stacks with fish in lower water. People will fish it early/late in the day and get maybe a few. But those middle hours are usually a waste of time. Get the river up with some color and the hole will produce throughout the day.
Just a few things I've noticed over the years.
Let the RAINS BEGIN!!!!!!!!!!!!!!