I am a complete rookie at this smoking thing, lots of reading not much doing. I have a Weber One touch Silver BBQ-22.5". I attempting my first turkey. I am trying to attain temps around that 300* mark. One chimmey full of coals was lit and banked on one side of the grill. After one hour in I have temps of 300+ at the top of the lid but the air temp at the turkey itself is 255. I have a digital probe stuck in a potato close to the turkey. Is this hot enough?