If you have columns over 16'-18' deep you have a good chance of picking a few off. Don't discount that they might be shallow for a while also. When the light is low very early and late they will rise into the warm surface water for a quick meal. Standing timber in deep water also works the same.
Normally I tight line, but when fighting wind, even in my Hobie which holds position well, I often change to a slip cork so I can cast to the pillar and drift by it with the bait as close as possible to the concrete. If I am 12" or more away, I try to improve my position. I cast so my bait settles in the light and drifts by the edge into the shadow. Travelling a fair bit, I have almost always done OK even on strange lakes.
Tight lines, Phill