At the hunt camp I go to, we have a smoker we generally use for hog meat. After cleaning my hog/deer and removing all the meat this last year, decided I'd try to smoke the bones prior to making them into stock.
Y'all, this alone completely changed my chilli game.
If you got access to a freeze dryer, it makes a nice instant broth as well, though be aware it can leave a bit of a strong smokey smell in the dehydrater, so ideally have something planned after that wouldn't be hurt by a slight smokey flavor.
For deer specifically if you're in a CWD area (we aren't yet but probably in a few years), be mindful of using spine/neck.