I am with White. Too lite a fasten job. Looks like the wolverine could touch the ground when caught.. Going to loose it. I would also say given the narrow path you have him on on the tree you could cut down the size of your loop substantially. Maybe deceiving but it looks like there is a good change that a wolverine could get a leg through it.
This is what a neck caught wolverine did to 1/8 inch cable last year on my line. Don't underestimate what you will be getting a hold of when you do. Or it will be a major bummer.
You won't have success covering your trap with snow.
I think one of the best things you can do is to experiment with traps at home, in the same conditions. Go outside and set a trap. Then go back the next day and see what it takes to set it off. I think you will be surprised at how hard disturbed snow will be. You can get by with a light covering over a trap with a covering but to bury your trap in snow is a loose loose situation in most circumstances. If they do fire they are so slow that you will be lucky to get a toe or less. Only thing worse than no wolverine is an educated wolverine. They can wreak havoc on your line.