I've pulled many limits of walleye's and a few pike out of that area through the years. My parents use to have a cabin on Rush. It was always a good place to go when there was a big wind...and not many people besides a few 'locals' would fish it. Most walleye's in there will be between 13"-18"...nice eaters.
I would typically drift down the river using my bow mount to hug the deeper side of the river, and either drag a blue or chart. fireball with a shiner...then, once I got near the mouth by Rush lake, turn and troll up stream with a jig or Little Joe spinner tipped with a shiner.
Awesome, I wish I could take the big Lund out on the river but it simply wouldn't fit, I took my 16 ft duck boat out there with a 9.5 short shaft motor and ran up it just fine.. We had the boat on the stretch between east lost lake and phelps mill.. Caught a lot of nice smallies and a few nice northerns in the log jams.. I have faith in the river producing our group fish this weekend, its going to take some exploring and finding the right areas! I'll keep you posted on how we do!