If you want to cast jigs, fish minnows (tightline or w/float), or even do some longline trolling ... you could use what you already have.

When I started Crappie fishing, we used 6' fiberglass rods & spincast reels with 8lb test mono. Every now & then we'd even cast a 1/8oz Doll Fly jig with them. But, most of the time we simply tied to a tree & fished straight down over the side of the boat with minnows.

You might want to downsize your line on the Bass outfits, if it's over 8lb test, but otherwise you should be OK with them for casting, trolling, and tightline fishing. And don't think that just because you've designated the smaller outfits for "gills", that they can't be used effectively for Crappie, as well.
If you don't already have these, you might consider getting ...
Some pinch-on sinkers (#4 size) ... some #2 Aberdeen hooks ... for tightlining minnows.
Some 1/16oz jigheads & various colored plastic bodies, & some 1/16oz Roadrunners (marabou) to cast. (along with your custom made jigs & Arkie tubes)

I don't know about your particular "slough", but Crappie have been known to inhabit such areas ... getting in when the river rises, in order to get out of the current, and becoming trapped in there when the water level drops.

While I do admit to having around 30 rods, from 5' UL's to 14' spider rig rods, I don't seem to catch many more fish than when I owned 2 or 3 "Crappie outfits" and tightlined minnows 90% of the time .... I'd much rather cast jigs, but have collected this many rods so that I can use most any method I know when the fish just aren't having it with the jigs.

... cp