Tip him 10% of the cost of the hunt upon your arrival and thank them for their scouting in advance of your arrival.

If they put you on some "good" animals over the course of your hunt give them the another 10% for a total of 20% of the cost of the hunt.
(regardless of if you take a trophy or not).

If he sucks; the original tip of 10% is all he gets !


Tip those who made your lodging comfortable and meals separate.