Yes, one time with my 4 boys. We did real well using swim baits.
It was last May but I do not recall the water temp. One thing you should know is that there is a big tournament on the water the weekend of May 1st and 2nd, 2010. There will be between 50 and 100 bass boats on the water competing in an open tourney. Good largemouth fishery. Idaho Fish and Game dumped hundreds of crappie into the lake last year in an effort to provide more food for the bass.
Good luck fishing!
Lynn