Andrew, my best perch fishing is in May when the water temperature is over 60 degrees with less water clarity which draws fish accumulations (not schools) of fish into water 6′ or less. Better yet is just prespawn when fish are in 4’or less hanging out for the next egg to drop (sorry for the pun). After that, like you said, covering water is paramount to catching any fish – and especially perch – which seem to suspend near one another.
As anyone who’s read my posts on different forums and speaking from personal experience over many decades, a ball head jig with some fish attractor attached is my choice for fishing any fish species.There are an infinite number of attractors that provoke fish to bite, the key being the size and action of the attractor.
Last year I decided to use the fluffy hair from my border collie and man did it catch fish either under a float or cast without one.
The hair I found pulsates with the least jig motion and as most of us know, finesse lures are all about lure action at the slowest retrieves. This last winter I caught over a dozen fish in my pond on the 1/24 oz. hair jig. Some tie feathers, deer or squirrel hair, tinsel and others, but it all comes down to personal preference via experience.
Soft plastics by far are my most product jig bait. Again, there are an infinite number of designs that catch fish – from 4″ bass to 7 lb catfish.These various shapes, actions and sizes ALL catch fish – including perch.
If you’ve caught bass on wacky rigged Senkos, you’ll recognize the mini-sticks shown above wacky rigging using a 1/32 or 1/16 oz jig. Amazing the numbers of suspended and active fish you can catch with that design and presentation. (Note the variety of colors – any or all which can catch fish in a single outing – clear plastic included.)
If you have finesse worms lying around, cut off 2″ of the tail and rig on a light jig.
Crappie Magnet grubs are also multispecies and do great most months of the year.
…as do Trout Magnets under a float:
The key is a slow presentation and finding the depth fish are striking. Could be 1 foot near the surface or mid depth in 6′. Pauses are necessary and I’ve found the only time I might use a steady retrieve is with curl tail grubs, Beetle Spin plus jig or trolling crankbaits like what this perch hit:
Covering water is key as is time of day which might only be one or two hours morning or evening.
Hope this advice helps.