Generally, not really. Many grillers swear by the practice. This ultimately depends on the smoker itself. Pre-seasoning (in this context) is simply meant to remove oils, dust, and other debris left over from the manufacturing process. Depending on who you ask, these are things that can be easily handled by hot and soapy water, a clean sponge, and a pinch of elbow grease. The included owner’s manual will lead you in the right direction either way. On occasion, a manufacturer’s recommendations buck tradition, so always read up on their maintenance suggestions before first operation.