RE: Parasites in Deer Meat
Sounds like some kind of bot fly or blowfly maggots. I've never heard of them in deer, but they afflict cattle and horses through open wounds. Maybe a wildlife bilogist would be a good source to consult, or a veterinarian. I'd toss that carcass if I just butchered a new-killed dear and found maggots in it.
"'Cause you is who you is and you ain't who you is not".