As you may have already figured out, the campfire needs to have a roof over it - but kind of high up or you will get smoked out (yes, you can die of smoke inhalation!). Then put a couple of beds in your house, near the fire. One for you, one for your wife. Press E on them to set your spawn point there. At night, you can sleep in them to pass the time or just get rest. Plop down a chest or two as well for a little more "comfort"... and a place to store all the goodies from your hunt. Place up to three cooking spits over the fire to cook your deer/boar meat (keep an eye on it so it doesn't burn - unless you want charcoal... and eventually you will). If you kill enough deer (you can "throw" a spear using the middle mouse button), you can place down a deer rug to increase comfort even more. As you progress, you'll add more and more to your little abode to make it more comfy for both of you!

Happy Adventuring!