Before a camping trip, prepare a chicken by buttering and adding your favorite seasoning, inside and out. Then wrap it in three or four layers of aluminum foil. Put the whole thing in a gallon zipper bag, and refreeze. Once the frozen bird is in the cooler, it helps to keep other food cold. By the following afternoon, the chicken should still be cold, but defrosted. Now remove it from the plastic bag and bury it in the hot coals of a the campfire for about an hour. Take it out with a shovel and cut open the foil for the best roast chicken you've ever had!
An instant-read thermometer has almost no weight and you can check your chicken to make sure it's cooked all the way through (I don't doubt you. The chicken sounds SO good, but I am kinda manic about food safety). Food poisoning would really bum out a camping trip.