Any type of potatoes will work but I prefer Russet for this recipe.
Move the pan around every time you flip the potatoes so that you don't run into any hot spots on the grill.
Try to touch the potatoes as little as possible. If you flip them too much, the fries will likely just break with flipping them.
Store the leftover potatoes in an air tight container for up to 5 days. I generally reheat in the microwave but the fries will be softer after they stored.