i read an article in a hunting magazine about one of the house rock hunts. it said it was tough (i think he waited for more than 5 years for a tag). i do remember the guy hunted and scouted for weeks. i'm not sure if he was being choosy or haviung trouble locating them. but in the end, he saw a dust cloud stirred up by two bulls fighting in a brush filled wash-out.
he pulled to a relatively high spot and stood on his truck to get a good spot on the bulls.
he did get one, and said that extracting it was very difficult.
having shot a bison myself (a 900 pound cow) i can say that even the smaller ones will take half or most of a day to cut up. if you had two people, and both knew what you're doing, it might be a little faster.
good luck on that tag! shooting a bison is a great experience.
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.