Has anyone fished this lake? If so does it have a good population of Largemouth Bass?

there is smallmouth bass,

My wife is from American Falls, so I fish it as much as I can.  I like fishing the river more than the lake, but both hold smallmouth.  I don't know if there are any largemouth in there or not.  The lake levels fluctuate like crazy so I have a hard time finding the bass in the lake.  The River gets LOTS of pressure, and it is a nightmare to try and wade with higher flows.  I always catch bass on the River, but it is pretty much impossible to get away from the crowds unless you have a boat.