Here's a very simple method for roasting whole potatoes on the grill. No use of foil or other gimmicks of any sort. Just oil them and cook them.
Ingredients:
Whole potatoes
oil to rub them
Instructions:
Depending on time allotted, cook potatoes indirectly as shown below,
Smoking: 225-275 deg, 3+ hours (THE BEST OPTION FOR FLAVOR!)
Roasting: 275-350 deg, 1.5-3 hours (Second best option)
Baking: 350-450 deg, 45-90 minutes
http://youtu.be/qSLcB3idE54