Hi there!
Do what Dave said and freeze the beast for a month or so. Then, I'd add about 25% pork butt from the store to the wild piggy. To say that the feral hogs are lean, compared to farm raised, is an understatement.
Now, wild hogs are typically in better condition and will have a very different flavor than their farm raised cousins. Depending upon where the animals live, the flavor will be different. At my place in East Texas, they almost taste exactly like farm raised since they feast on corn, peanuts, and other grains that we feed year round. However, at my uncles place in the panhandle of Texas, the critters have a flavor that I can't describe. It tastes wonderful, but I'm not sure why it's flavor is so much different.