There is a design conflict for these harnesses.
Anything snug enough to hold the binoculars tight while bouncing around in an ATV will also be tight enough to chafe while squirming through the brush. So I've eliminated chest harnesses from consideration, after repeated disappointments.
An effective design would be easily cinched tight when needed, but otherwise relaxed. It should also be easy to wear and compatible with both heavy winter as well as lightweight summer clothing.
The various suspender type harnesses are good for comfort in my experience, but are a bother to put on and don't handle ATV rides well.
A belt clip with a shoulder strap seems to be favored by the big lens crowd, but I've not seen any such offering aimed at binocular users.
New ideas are needed.
Have you used the RY harness in the situations you've described? I'm guessing you haven't. I have many ,many times and the RY harness plain works.