It depends on how far you want to drive. In eastern SD I would try Lake Thompson or Waubay. They are big lakes and won't freeze for a while. It will be quite a while before we can drive on them I would imagine. But there are smaller lakes north of I-90 that hold walleye. I have caught walleye at Lake Vermillion, Brandt Lake, Lake Madison. I live by Lewis and Clark Lake by Yankton. There are some decent walleye there but the past few years driving on it has been risky in my opinion. I will keep my ears open and post any info when the lakes start to freeze.