Just did a little research and saw that in the 5 tourney results found it only takes about a 1.6-1.7 average to win. It appears as though there are a lot of 1-2 fish bags, and in all 5 the big fish was under 3.5 pounds. Sounds like a tough fishery. I would go on the hunt for clearer water as Fishfordollars said and try rockpiles just under the surface that create eddies and fish them with a shallow diving crank or white/silver tube on a 1/4 oz head. I would also focus on any form of cover/structure that allows the fish to be stationary just out of the current and the current right in front of its' nose that would send food past it. Such as a group of pillings, jetties, ect.
Also, don't over look the power of bridge pillings and the drop-shot rig. If there is too much current for it try a dropping and ripping Silver Buddy. 8-)
I would bring a shallow diving crank, a deeper diver (preferably a Wiggle Wart). A 1/2 to 3/4 oz spinnerbait with a big colorado blade, 3.5-4" white/silver tube, drop-shot stuff, and a black blue spider jig. Create a milk run containing a dozen or so spots and fish them fast. If they are there, they will eat it, if not, move to another.
Atleast, thats what the Connecticut River has taught me... :-/