I use them quite a bit during the Spring spawning season, casting them along spawning banks. I use 1/16oz marabou Road Runners, mostly in "pink" or "hot pink", that I had custom tied by our member "skiptomylu". Prior to using Skip's custom ties, I had used marbou Road Runners in white or chartreuse since I was a young man.
While I do have a "bunch" of RR heads and packaged RR's with various plastic body types, I still tend to use the marabou RR's about 99.9% of the time ... simply because I'm very successful with them (as I've always been over the decades).
I've trolled with them (single pole in hand) and even shot docks with them over the years.

Here's a pic showing Skip's custom work done for me & some of my fishing buds, from back in 2021. (Skip is authorized to use Road Runner heads for his custom ties.)


Needless to say, I've caught several other fish species besides Crappie, when casting a Road Runner.