Ahoy Mates,
Kerry, you have been given much good advice. The game can be a bit tougher in August than you might first expect. The fish tend to be more concentrated and deeper. They are also fat and happy and have settled into definite patterns as when and what to eat.

PJ is quite likely correct in pointing out that walleyes may be at 30 and 35 ft. I also agree with snow dog that big cranks is the ticket for their extraction. I am also partial, as per Jaximus suggestion, to go with the Taildancer except I am quite partial to the 30.

My advice is thus: Rig a depthfinder (kingfisher has the best set up that I have seen....use the "search mode" in this forum to view). A depth finder is an invaluable tool especially in August. Then I would rig a rodholder and troll around in 25 to 28 ft early in the morning with a big taildancer on 8lb mono. Take some backup taildancers as northerns may deprive you of them. You must be able to tie an excellent knot as the 30 taildancer will put considerable strain on your line. If trollings not your game then Jaximus suggestion of using the 20 taildancer and casting from shallow to deep has great merit. Make a long cast and burn the lure down until you contact bottom and then slowly work it up the incline subtly banging the rocks now and again. Of course trolling will help you locate the fish and is usually what I do before wearing my wrist out with endless casting.

Smallys in August can also prove a bit more complex than one would like. With gobs of crawdads about the living is easy. Again they tend to be grouped and deeper. It is easy to spend a lot of time fishing with out so much as a strike. Again the depth finder would be absolutely crucial to me in August. I like to finesse bass in the summer and that means 4lb line and 4 inch straight tail finesse worms on light wire 1/8 jig heads in 15ft of water.

Last but not least I would plan to be on the water on or just before first light in the mornings especially if you are determined to use tactics that are best suited to june and early july (topwaters and shallow running crankbaits).
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I'm back in town for a few weeks and am looking forward to checking out some trip reports. We did well on our trip with every one catching sizable fish. (the 14 year old had a smally of 4.5lb, a walleye of 5lb, and a laker of 8lb....he was a happy camper  :) ). I am quite jealous of you Kerry.....my 7 days only whetted my whistle. I still haven't fully accepted I have to wait another year before I get back!