We tipped our packers. This was a drop camp with little to no hunting help past a pointed finger and small talk of elk hunting.
The Lord smiled on us and we were 5 hunters with 5 bulls down. The packers got $30 per animal, and the "cook at the lodge got $40 for cleaning up after our showers and a sandwich.
I would agree that the owner would have to do something pretty darned special for a tip. He has already set his price and doesn't expect a tip for contractual services, at least he shouldn't. The hired help however can be as good or lousy as they want to be, and the owner won't be the wiser till it's too late.
We return to this outfitter, and I would like to think the tip ain't hurting how the meat is being handled at the lodge. The use of the showers is only more work for the cook and not a part of our arrangement, the sandwiches were a kindness too.