1/10 of an acre, cool doesn't take up much room, camp 1/2 an acre... I worked for mining and exploration for some years have alittle idea of what goes on. Lets not count the quiet bit of dumping that happens, run off, that doesn't hurt anything at all, nothing to worry about.
Nothing lives there, nothing could live there, it's dark over half the year and there is no vegetation at all.
artic fox, muskox, lynx, martin, caribou and some people wander through occasionally. Rather big area, quite pretty in the daylight 6 months of the year.