Perfect! You'll use both.
Start:
Time TBD by you.
Clean out the ash. Save the used but still intact charcoal from a previous smoke for a shorter, different smoke.
Put down a single layer of briquettes. It will keep the smaller lumps from falling through the grates.
Add four fist-sized chunks of your wood of choice. Spread them evenly across the briquette bed.
Overfill the charcoal basket with lump, burying the chunks.
Make a dimple in the center of the pile, one large enough to hold 8 briquettes.
Light 8 briquettes in a chimney and let them ash over about halfway, then add them to the dimple.
Assemble the
WSM. No water. Top vent full open, bottom vents open no more than 1/8th inch. You are starting a slow fire to preheat the wood chunks and maintain steadier temps.
Walk away for 1.5 to 2 hours. Temp will rise slowly over that time. The wood will preheat and start to carbonize without flaming.
Do you need a brick? If your packer is long, two options. One, trim off some of the flat so it will fit. Two, place a brick in the middle of the grate to heat with the smoker. You'll drape the packer over the brick so it will fit when it's time to start the smoke.
Trim:
While the smoker is preheating, trim the brisket. Common guidance is trim fat to 1/4 inch. I like more fat and only trim the discolored fat and hard stuff, leaving the rest even it it is thicker. You'll trim off about a lb that way. Trimming to 1/4 inch or less can remove up to 3 lbs. Waste of money.
Rub:
Your choice. Avoid sugar. Salt and pepper is fine. 2 parts salt, 2 parts pepper, 1 part granulated garlic (not powder), and 1 part granulated onion is another choice. Montreal Steak Seasoning is easy. Paprika is optional, but it is not a favorite of mine on brisket. I don't inject anything but turkey.
Load meat.
When the smoker temp is rising slowly and is between 200°F and 225°F, and the smoke is thin, add the meat fat side down toward the fire or you'll have a stringy, overcooked bark on the bottom. Do not stick a meat probe in the meat. Save that for later.
The chamber temp will drop A LOT when you load the meat, but don't touch your vents. The colder meat is a heat sponge and is absorbing heat energy as the laws of physics state. The fire is still burning exactly as it was before you loaded the meat and climbing slowly toward a steady state. As the meat warms, the chamber temp will climb. There's a physics reason why that happens, but think of a warmer brisket like a sponge nearing saturation: it absorbs less available heat energy per unit of time.
Progress.
Between 3-5 hours the meat will have warmed and the chamber temp will have recovered. Decide if you need to open or close the bottom vents no more than 1/16th inch at a time. Your
WSM should settle in between 225-275°F and you will not have chased temps. That's the major benefit of a slow fire and why I sleep on overnight smokes.
You can insert a meat probe in the center of the flat at this time if you want. Ignore the thicker, fattier point. It will fool you into acting too soon when you think the brisket is done. Plus, you might have the probe tip in a fat seam, which will fool you even more.
Remove the brick (if used) once the meat shrinks.
Finish:
At any point in-or-near the end of the 3-7 hour stall (depends on chamber temp) you can decide to paper or foil wrap the meat. Add a cup of HOT (not cold) beef broth if foil wrapped. Once wrapped in either paper or foil, open all the bottom vents all the way. Stick the meat probe back in the center of the flat right through the foil. It will finish in 1-5 hours, once again, depending on chamber temp.
Once the meat reaches 200°F, probe the flat for tenderness. I like a little resistance that will melt away during a rest. What do I mean by a little resistant? The probe doesn't stop or require pressure to advance. That usually happens between 200°-205°F, but I've had briskets reach 207°F and still give a little more resistance than I like.
I stick the wrapped brisket in a pan then into a 140-170°F oven (my oven is 170°F). I leave it there for 3-5 hours before turning off the oven. Then it's onto the counter until cool enough to stick in the fridge and chill completely.
Have fun. Trust the heat, the brisket, and the sense in your fingers, and your
WSM won't let you down.