Rapaire is already thinking of anatomically correct snowMEN positioned over holes, with anatomically correct snowWOMEN placing the flag in...well, nevermind.

Oh, oh! I just thought of something!

I'll freeze some yellow colored water in a narrow arc, walk over to the third green (approaching it from a different direction than directly from my house!) and place the frozen arc appropriately over the hole. I think I'll take some unfrozen yellow water with me and sprinkle it around a bit. Footprints to the arc, footprints away from it...boy, was it cold out!