To me, tipping is a very subjective item. I guess I would base my tip on how my expectations were exceeded? You already paid $X.XX for XX days of hunting which includes XX services.
Did you get any extra days?
Did the outfitter work hard to be sure you saw game?
Did he/she meet or exceed all the the services promised in the base package?
Did you have the time of your life?
From there, I would judget how much of a tip I would leave. I don’t know that I would follow the same rules I use in the food service industry, 15%. That could be another $750.00 on a $5000.00 hunt. Then again, if I shot a ginormous elk and had the best hunt of my life, I might.