I doubt there's anyone willing to pack meat for you in that area, other than maybe an outfitter who might entertain the idea. There's a group called "U tag, we drag" out of the Jackson area, but I am not aware of anyone around Rock Springs/Rawlins.
Unit 100 is a good elk unit if a guy's desire is to glass a lot and get a mature bull. The downside is, it is a total desert hunt (other than maybe around Steamboat Mountain or the buttes further north) and just doesn't seem like 'elk hunting", to me at least. I also think there's a mineral lacking out there in their diet. Added to that the bull/cow ratio is heavily biased towards it being a trophy bull hunt and with the lack of trees sun bleaching the antlers, the result is a LOT of broken and busted up bulls.
I know a lot of elk migrate into the area from the Winds and elsewhere come winter, but during the bull season you'll be hunting the resident desert herd. There's a lot of bulls in there, but be aware of the factors I mentioned.
