Yes, don't worry if you don't have a grill! Cook in the oven at 400 degrees for 30-35 minutes. You can absolutely cook this over a campfire as well--Timing would naturally depend on placement and intensity of fire, but just cook it until the chicken is cooked through. I haven't tried this in an air fryer, but I would recommend cooking at 400 and beginning to check the chicken temperature around 20 minutes--It will likely take a little longer, but that depends on the size of your air fryer and chicken breasts.