In my experience, public ranges and the folks that use them to be very accommodating.
I would just let the range scheduler know that I was shooting an ML and would like the position as such so that the wind would not carry smoke from my shots into the FOV of other shooters. If the range is a North/South layout, then it's easy. You have the far-east position.

I also have my own and a few private ranges that I use and thus do not go to public ranges that often anymore.