We used to guide, hunts generally cost about 2500 bucks about 15 years ago.
If I got 100 from someone thats all I wanted at all, it was a nice thing, an extra 100 in the billfold, but you've paid for the hunt already, I'm being paid and if I'm not paid enough thats my issue and one reason I quit.
I HATE the idea of tipping actually... salary should be built in IMHO.
Of course I'm the type that would give you as much as I had effort wise regardless.... I"m either all in or all out.
I did receive a rifle once as a tip, that was about the biggest tip I ever got. The guy was a millionaire and I'd have just as soon had a 100 bill instead... but I still have it somewhere in a safe.