lake Oahe seems to be the walleye hot spot of choice. I have never fished east river even though I have lived here a very long time. Some day maybe I will have to try it out. If you ever visit your sister you are close to me, so stop by and visit. we can go shooting in the pasture . I go to Piere for chess tournaments a few times a year . It's only a little over 2 hours so you would be close enough to stop by.