Last year we had a winter warm-up and I had a hard time keeping skunks out of my fisher sets. This year I may try an elevated body grip, such as a 120 in a newspaper tube or a 160 in a box cubby. I'm inclined to try a leaning pole but haven't ruled out a vertical tree.
Are these kinds of sets very effective for fisher? What's a good way to anchor all this to a tree as far as stabilizing & securement?

It seems to me the general consensus around here is that if there isn’t snow on the ground then they’re less likely to climb. This is just what I have been told, I haven’t experimented myself so take it for what it’s worth.

I have never noticed any difference in climbing do to weather conditions, snow or no snow.

Using the search function on this form re "fisher trapping" will provide most, if not all the answers to your questions.