I think if you had a realistic looking enough suit, and weren’t scented, you could probably get very close to wildlife. I also wonder if dressing as machinery or farm equipment would work?

As a side note, in crunchy leaves I will try to sound like turkeys. While I walk in I’ll yelp and click & purr. I’ll even go so far as walk, scratch the ground, walk some more. It makes MORE noise, but when you hear turkeys in my woods, they make a RACKET.