In my limited experience, I’ve had success grunting bucks in once they’re within sight. This has usually been set up over some form of rut funnel. I generally assume calling to be less effective in mountain areas due to lower densities and worse buck to doe ratios so don’t typically blind call. That at least is the experience I’ve had in other low density areas and it seems to have held true the past few years I’ve been hunting the big woods.