I use kingsford and tiki fuel. Not the kind of tiki fuel you get at home cheap-o, but the kind you get from the diesel pump. I use the lid from my fire pan to cook them on and put rocks or wood under the lid to get it off the ground so you don't scorch the soil. On big trips we will stack a couple of 12"er with the main dish in them, then stack a couple of 10"ers next to them, full of desert fixins. Fire pan lid holds them all, right next to the fire pan that I started the charcoal in. Once done cook'in, I pour all the ashes on the lid back into the fire pan....along with the hot coals. Of coarse, everything is kept on the fire blanket.
The guru that taught me about Dutch ovens, gave me this simple formula for how many coals to use. Diameter of oven x 2 = number of coals to use to make the oven 350 degrees. Add or subtract coals at 12 1/2 degrees per coal. Put 2 more coals on the top than you do on the bottom from the total number of coals you use.
Example 12" dutch oven at 350 equals 24 coals. Put 10 coals on the bottom and 14 on top. For an 10" Dutch oven, it's 8 on the bottom and 12 on top.
Spin lid seperate from the oven on the coals for more even cooking temps. Half a turn each every 20 minutes or so.
No peeking until you can smell it cooking. Remember, each peek adds time to the finished product.
Here is an easy desert you can make. Take a Hinds Super Moist cake mix. Substitute the oil or butter that the recipe on the package calls for, with sour cream. Mix all ingredients and pour into the dutch oven. Take a can of your favorite pie filling and pour it in the middle and lightly stir it into the mix. Put the coals on the oven using my formula above. In about an hour....or when you can smell it.....get out a tooth pick and check to see if it's cooked. Eazy Peazy A 10" Dutch oven is the perfect size for one cake mix as described above. Good luck.
Favorite cake and filling combo's are.
White cake mix with strawberry or cherry filling
Chocolate with strawberry filling
Lemon with red raspberry or blackberry filling
Spice cake with apple...great for mornings too.