I used to run a line on the Thief River in MN. My partner would drop me off in the morning and I ran the river and he ran a land line and picked me up at a down stream bridge at night. I trapped fox on the banks and raccoon, beaver, mink and muskrats. On slow days where I knew I would be at the bridge early I would call fox in openings along the river. It wasn't real productive but an occasional $100 fox was a pleasant addition.
Even if it isn't real productive any additional fur is a pleasant bonus. A calling stand is never a bad idea.
Not exactly what your asking, but you have nothing to lose but a bit of time.