I agree with 10% being a good starting point. I’ve only done 4 guided trips in my life- 1 fishing in Alaska, 1 fishing out of Westport and 2 pig hunts in California. The fishing trips I didn’t tip the business owner driving the boat because I’ve already paid him a bunch of money. I tipped the deckhands $200 per day. On the pig hunts the guide who spent the days with me was an employee, so I tipped them $250/day. My last hunt I filled both my tags on the first day, I still tipped him the $250 for both days of the planned hunt.