Along the Mississippi, the water will back out of the different oxbows at different water levels. Take Midway for example. The water will start retreating and start clearing up around 25.5 on the Memphis guage. I like to get in a place like that BEFORE the lake level gets back to normal. The fish will be back in the brush and you will have to find them. But when you do, it is game on! Also, as the water retreats, the fish will pull back a little each day. They are easy to follow.
As CrappiePro said, get that spider rig out once the water gets back to a "normal" level. The fish will pull out to the deeper water, and that's relative to the depth of the lake, and hold there for the rest of the summer for the most part. There may be time you will still find some fish in the brush or on the trees, but the majority will pull out to where the food and most comfortable temps are.

I would expect that as the water retreats, this is going to be fast and furious as the water temps will rise quickly with this being late June. For me, I find on the shallow oxbows the bite gets tough once the water takes on the brown appearance and the temps go 90 or above. For some deeper oxbows, such as Tunica cutoff, fish can be caught all summer long.

That's my .02 anyway.