Over here, over the big pond, it's just now (pushing) hunting season for wild boar again. We also prefer the smaller ones (up to about 50 kg without offal) for eating. The so-called "rauschigen" boars (those that take part in reproduction and are full of testosterone, usually the bigger and older ones) have a coarse taste and are usually only turned into sausage. You can tell whether the boars are "rauschig" by their smell (they stink more than the others). All other pigs usually taste good. In this case smaller is better. After the gutting, we usually let the pigs hang out in their skin at a temperature of no more than 7 degrees Celsius (cool down to this temperature as quickly as possible) for about 2 days before further processing. This will make the meat more tender, but it will also be harder to remove the skin.
You can marinate them in buttermilk, red wine, orange juice, pineapple juice, apple juice, etc. I always add bay leaves, juniper berries, pepper, garlic and some others what I I get in my hands to give it a little more flavor. I put all together in a plastic zip-bag or pot and put it in the fridge for about 12 - 24 hours.
Here in Germany, an examination for trichinae by a veterinarian is also required by law (no pig may be released for consumption before such an examination). Because of the other possible diseases (which actually only occur very rarely), we look at the internal organs when gutting. Every hunter has to learn the (alarming) characteristics of the various diseases (for all possible huntable animal species) in his education.