I fished the east boundary last weekend in 6-15 ft water and saw nothing on the FF and had no bites with flashers, bobbers, bottom rigs. Went out to between the island and the south peninsula stumps - be careful of these deadheads - and found a few fish marks near the bottom at 38ft. One bull trout (likely) stripped about 20yds off the flasher rod and wrapped around a stump. Lost the whole rig and fish. Another sculpin take down. Otherwise not a thing.
I think the fish are deep in the river bed, 100-200 feet would not surprise me. The water skiers were messing things up a bit. Usually early in the season topwater rules, but like all lakes, unless its early/dawn, most hot/skier days will put fish down. If you don't have riggers, then put out a max of four trolling rigs with 3-5oz banana lead and flashers/wedding ring. Pretty much 1 pull per foot down. No snubbers unless using braid. Sling blade and koke'a'nut works well too. Crawlers at the end. Good luck.