If you choose to go after the fish when they're suspending, chances are pretty good that you'll need to put your presentation in their face for a long time. Good electronics will let you 'watch' your jig or spoon as it falls so that you can stop and keep it in that zone. You may want to try a suspending crank paused just above the school. This would be an excelent choice if the fish are suspending below baitfish schools.
Most guys don't have the patience for either of these techniques, but there's good news for them (and me). First you need to find the depth the fish are suspending, now move to the nearest structure (points,humps, ledges) that intersects that depth and look for cover on it. These spots on a spot are major producers on impoundments in the summer.
The other good news is that some fish will always be shallow providing there is forage, cover, and deep water access. Hit these spots at the right time and you'll not only be targeting those shallow fish, but the ones that move shallow to feed. The fish that are deep have the roaming baitfish to feed on and although they may come up in the water column, they rarely will move into the shallows until the baitfish do.
I would start my day targeting the shallower fish and move out until I find am active bunch. If I pick up a fish here and there early, it's a good indication that the fish are active and I can target those spots on a spots I mentioned early and get into some fast action as those fish will turn on quicker that the schools suspending over deeper water. A note on your presentation here; cast from shallow to deep on these spots or at the very least, parallel them. Your presentation will be sure to contact the zone and if you do excite the school, you won't scatter it into deeper water when you do catch one.