".any well made "coyote set" in fisher territory might get worked by a fisher...."
while i've always thought about trying some running pole sets, i've snapped enough during non-season to know they're not required. as stated, regular dirthole sets take them fine, trust me. even nailed one- the only one i've gotten in season, on a flat set, but baited nonetheless.
i'm sure lots of stuff works, but for me, experience has shown deer scraps works best. especially in light that they're hitting gut piles right now, 'new' deer scraps down a hole after piles in the woods start to disappear does the trick.