Haven’t fished Oconomowoc this year but I hear the channel is extremely low. People are scraping their hulls at the bend. There is a huge sand and gravel bar (SW of the river)that holds walleye at night at the inside weed edge. I have cast husky jerks, shad raps and thundersticks along and down slope with success. There are many nice rock bass there as well. Have caught big smallies there, too.
They have been getting smallies in 4 to 6 feet of water but I believe the pattern on the lake is changing due to the cooler nights.
Walleyes keeps are 18 inches so be aware as there is lake patrol that checks “non locals.”
Good Luck
D