Ok, a couple things.
He has two choices. Heat with wood, or heat with charcoal and add smoking wood.
Generally in a smoker this small, it's going to be hard to burn fresh wood and keep it hot enough to burn off VOCs [volatile organic compounds]. This is the stuff in wood that smells and tastes nasty. You know when you start a campfire and you get a bunch of thick white smoke, but once you actually get a nice bed of coals the fire burns cleanly? You need enough heat to burn off those VOCs to get to clean burning. And that's a LOT of heat for a small smoker like this. Cooking with raw wood, it'll be damn near impossible to keep 225 or 275 degrees in the smoker with that kind of fire.
So I'd do one of two things:
Heat with wood: Assuming he has access to hardwood logs that he wants to use. For this, I would have him burn the wood in a fire pit or something else for pre-burn, and then shovel the hot coals into his firebox. This allows him to do his entire burn with hardwood but the VOCs will already be burned off in the pre-burn. This is sorta the "purist" method for an offset smoker.
Heat with charcoal: In this case you simply build a fire using charcoal (lump or briquette, his choice) in the firebox, and use hardwood chunks rather than chips. One bag from your local big-box hardware store is more than enough for an 8-hr cook, as you add maybe one or two chunks when you start the fire and only add more if you find yourself running out.
@Horseflesh above has a Big Green Egg, similar to the Kamado Joe I have. In those smokers, our fires are VERY small because it doesn't take much airflow/fire to keep 200# of ceramic at 225 or 275 degrees. In your dad's smoker, you'll have a lot more airflow due to the material and construction. But in either case, you regulate your temp largely with airflow, and learning how much airflow you need takes time and experience. So I highly recommend your dad do at least one test burn before he actually throws wood on there. It's a great excuse for you and he to sip homebrew for a few hours learning the smoker.