Put in 6 wood (easy to split with middle mouse + right click) and 4 of only pork,chicken or wolf meat split into halfs as shown in picture below and let cook. This will cook using all wood and will not burn the meat or overspill out the camp fire.

Bear meat takes longer to cook so you will need to half it otherwise it would overcook, 3 wood and only 2 meat. This will take longer but you will not lose any food due to overcooking.

Place a bunch of campfires in one room, set them all up for the food you need to cook and you will no longer be having to sit there and take it out as soon as its cooked or be losing food due to it being over cooked.