I'm taking a solo camping trip next week (for 5 days) and I'm planning my meals. For dinner I'll be making a campfire to heat my precooked meat and I'll be doing veggies in foil pouches in the fire. For dinner one of the days I want to use cut up sweet potato with a little olive oil and spices in a foil pouch. My question is how long do you think it would take to cook in a campfire in a foil pouch? Or do you think I could skewer the chunks and cook them like a shishkabob or are they too hard? Should I try to precook them and then just reheat with the fire?