Regarding a contour map of the river; I'm not aware of one that goes much past the Hwy D/E bridge, but my experiences fishing north and west of there are that the river becomes pretty predictable regarding depth and holes are where one would expect them to be.
I haven't fished as much the last couple weeks as I normally do, and haven't had very good luck when I did. I have managed a few crappie and a few smaller walleye, but only a few. No specific pattern has been best, but the fish I did get were on live bait jigging or on small crank baits cast along breaks in low light. A 6-10 foot weed edge has been the best for me. A few fish in the timber on the river channels, but not as many as usual.
Hopefully stable weather will promote some good fishing soon. The lake is clearer than normal for this time of year, algae bloom is just starting.