I want to add even more flavor in my BBQ, can I supplement this charcoal with something else?

Absolutely! For added traditional hickory smokehouse flavor, soak 2-3 cups of Kingsford^® Hickory Wood Chips in water for 30 minutes, drain and spread evenly over ashed-over briquets or add 6-7 Kingsford® Smokehouse Style Briquets with Hickory to hot coals.