This was my mainstay during outdoor shows last summer. I'm sure this is not an original creation, but I like it.
While still at home the night before contemplating a show...
Create the marinade in a medium bowl;
1/2 cup orange juice
3 cloves of garlic, finely chopped (I use a small hand chopper, keeps the smell out of your hands)
~2 tablespoons olive oil
salt & pepper to taste
You could also add some mushrooms and onions, chopped if your like, but may be better added at the grilling stage.
Mix the above ingredients in the bowl, then add the chicken and coat. Add the contents, chicken and all, to a gallon size plastic bag and allow to sit overnight in the fridge. The next day, throw in your cooler along with some corn on the cob, still in the husk. Make sure the corn stays submerged in water for at least an hour before grilling.
Set up your gear, grab a beer, and warm up the grill.
Make a small makeshift pan out of some aluminum foil. Pour the contents of the bag, marinade and all, into the pan. Place the corn on the remaining space on the grill. Arrange the breasts in a single layer, and cook until the internal temp has reached 165 degrees, or until no longer pink on the inside if your forgot the thermometer like I usually do. Meanwhile, turn the corn every five minutes or so until the outer husks turn dark brown for about 20-30 minutes. When the chicken is done, pull it off the heat and leave on a plate covered in foil if the corn is not quite ready. Husk the corn, slother in butter and salt, and eat up.
Enjoy the sunset, and flip the switch

+-RH