$200 is fine to accept, and half the meat is not bad IMO. I would try to give someone at least $50 if they refused then offer meat. It is a lot of work, and I would help someone out with one trip, but more then 3 or 4 hours cuts into my time. Assuming they are not really in a bind and meat might spoil. I have barely enough vacation time to hunt and missing a large chunk of that (ie a full day) is simply to much for me. I would help someone out midday until it was 3-4 hours before dark. And midday whenever needed after that.
I had someone offer to ATV in to my elk (within 1/2 mile) then help me get it the 1.2 mile to the ATV and drive us out. They asked for $50 for beer $$ and I was more then happy to agree, saying I would get them $50, and the beer and bring some elk over to eat too. However, upon looking into it, we were not allowed to take ATV's on the closed road so I was on my own. 8 guys and no one voluntered to help so I did it alone. Funny though, they loved to walk in part way with me (on the way in to pack meat out) and ask where I was hunting etc., but they never helped.