For those who don't know, the Alaska-Pacific River Forecast Center is a "pretty good" source of river information for those planning river trips on many rivers across the state of Alaska. They don't have guages on all rivers of course, and so you might not find "your" river there. But it might be worthwhile to check it out before you go, to determine flow rates and such. HERE'S THE LINK.
Good Floating! Keep safe; wear your PFD!