Calling seems to be working for a lot of hunters, I use another strategy.

I pick out a likely area, lots of Rabbits or Hare, lots of grain fields which draws Mice, Chickens and Rats seem to go together, nesting area for water fowl etc. I go out after a rain and make a map of any tracks I see. I might walk a couple of miles in hundred yard grids. Once you get the hot spots mapped out you can use that maps for years. Another Yote or Fox will replace the one you eliminated and will scent trail the last one that occupied that area and hit the same food hot spots.

I set up early morning before sunup on a good spot and ambush them.

The thing about Fox or Yotes is you hunt them where they have already been. They are territorial and make the rounds inside their territory. Might not be every day in the same spot, but I rarely have to sit for more than three mornings before I bag my Fox or Yote.

I can see where calling can be more pro active, just sitting can be boring.