The steelies you saw jumping might have been downstreamers (spawned out winters). I know when they come close to spawning in the spring they splash around alot before spawning. However, i have seen some bright summer fish roll to, but that many in just a few hours is probably not summer runs, given the time of year and water conditions. Have seen a few fish taken on the sky so far, looks like a pretty good season ahead.....
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"I have a fair idea of what to expect from the river, and usually, because I fish it that way, the river gives me approximately what I expect of it. But sooner or later something always comes up to change the set of my ways..."
- Roderick Haig-Brown