Thanks for all the input.
I agree that I should learn from this. Also I am gratified to know that what I was expecting is usual and customary, that is, to share the costs and the harvest.
It occurs to me that with a new acquaintance, I feel most awkward discussing a potentially confrontational subject beforehand, fearing it would be misunderstood or would somehow taint the new relationship, but these new partnerships are exactly the ones that need it all spelled out in black and white. You really don't need to do this with your old friends.
I also wonder if age difference plays a part. I am 59 years old, about the same age as this guy's parents. Maybe I get dealt with a little different than his usual buddies.
I do have a long time partner that can still go deer hunting, but he had to give up this goat thing, his knees won't take it anymore. With deer, we usually each get one and pack his own, and just take turns on whose boat is used for separate trips for fishing and hunting, figure it works out close enough.
I won't have the time to do another goat hunt this year. God (and running program) willing, I do plan to go next year, maybe to this same spot, but will probably try to 1. go opening day and 2. take a different partner and spell it out somehow beforehand. I have gone goat hunting alone, but the steep cliffs etc are not good places to be without anyone to help in case of some mishap.
This year I saw three nannies with kids, one with twins, plus two possible billies that I could not get to. The critters are there. Next year may be my turn again.
I do like the scenario where he is going to show up with wrapped meat, and a cash donation, I have been thinking about that one. But I don't think I want to ask for it, just too much of a confrontation to come away with anything worth saving.