Mike,
On the Saint Croix, shad, cut sucker, shrimp, and cut sheephead have all produced well for me (along with crawlers), but I have not tried these baits up on the Rainy. Part of this is my reluctance to try something new. I know crawlers work, and since you only get to fish with one rod up there, I don’t want to risk a 60″ fish passing up a bait when I know they like crawlers.
I haven’t broken my crawlers up like you mentioned. I might have to try that.
One thing we noticed last year, but I think it might be a coincidence. We had two flats of crawlers. One that was packed in the dirt they came in and one that I have washed and packed in commercial worm bedding. It seemed, for one day at least, that the sturgeon had a distinct preference for the crawlers from the bedding. I don’t know if there’s anything to it, but I like the bedding anyways because it’s a lot less messy.