They are not hard if one has some basic cooking skills. I recomend a pot roast for the begainner. One can learn to get an oven hot and sear the meat, add enough water to almost cover the meat and add the vetables desired. One can cook it all afternoon and as long as it don't go dry it will be fine. One can tell by opening it from time to time how much heat you are putting in.
One neat little trick you can do to impress your friends is simple, the first picture is a pot roast, or accually sirloin steak cooked that way. (My wife had bought a bunch on sale and I swiped it for a hunting trip.) This one just has potatoes and onions, I decide to cook the steak that way and had the potatoes, but was to lazy to drive to town for more.
The first picture is the roast hot and steaming and the meat and the potatoes are done, but the potatoes are kind of a bland white.
After I took this picture I move the oven a bit and did not put any coals on the bottom, I did sweep off the lid and then piled on as many firey red coals out of my fire as the lid would hold. I then got my gear ready to go out for sunset and watch for a deer. When I was ready I snapped the picture of the browned potatoes covered it, reduced the coals on the lid and went to hunt. When I got back supper was warm and ready, a freind stopped by and we ate this.