RE: potty break?
Off the side of the stand. (just watch that wind. lol )
Heck, if the fox, coyote and bear whizz doesn't spook them, your's won't.
Now for the other. I get out of my stand and take a short walk, according to the wind. My father and brother have large stands and keep 5 gal pails with lids and with port-a-potty plastic liners with the chemical gel in them.
My brother and father have not only had deer walk thru with no sppoking while "occupied" but my father has shot a nice 8 point while "on the can".