These river maps are very helpful; one suggestion is print off a set and take them with you, I have a set in my boat and refer to them often especially as I am a newbie to river. I have found they hold their resolution nicly even in you expand the view.
Remember that the river is always changing, what I have learned is that it is a very dynamic process and with constant flow and water clarity the fish move all the time. I must confess that I am still not as adaptive as I need to be in adjusting to changes in the river. But thats why I think its so much fun!
Using the river maps as a guide, each trip I explore a couple of new wingdams and other likely locations. I have had some trips that I hardly fish, instead I spend my time using my electronics to really get the feel for different river spots. Many of the wingdams are partially silted in and what I am learning is that these still hold some semblance of stucture, probing these with a crank bait helps find the remnant rubble and the fish.
Also the Corp of Engineers is always making changes, several spots I use to fish have been significantly changed and are not as fishable, but they have also added a couple of very nice wingdams! Point is be flexible and adaptive. Use your eyes and electronics! With practice, reading the surface of a river, especially watching for changes is flow can be very useful. I sometimes think we may over rely on electronics over use of our own eyesite and instincts.
The last piece is I.D.A. I have learned so many tricks from others posts and try to contribute what ever I can to the discussion. Sharing information is essential and make it fun. Also, dont hesitate to PM people.
See ya on the water!