So since I see a lot of the same complaints in this thread, I've decided to address a few. This post is specifically about side fired stick burners.
If you want to make it as set it and forget it as possible there are a few steps that need to be taken. First and foremost, buy the right smoker. Too many are for sale these days, especially at big box stores, that are thinner and lighter than propane grills. This is a huge berkeleying problem!
You want the thickest, heaviest metal you can find. It will take longer to heat up but will stabilize itself better and hold heat longer. If you can afford to, jump straight to a reverse flow smoker. .
What this picture doesn't show that is important is that the chimney should go the whole way down to the grilling grate for best smoke/heat coverage.
If you can't afford that, you need to make some of the modifications that Curtis mentioned.
Mods:
Flow plates: a plate, even a cookie sheet, that attaches inside the cook chamber where the opening to the fire box is that goes most of the way across the cook chamber. Why? This passes the heat under everything that is coming instead of just straight up and across. It makes the cooking chamber more oven like.
Move the exhaust if you can, as close to the fire box as you can. After putting in the fire plate, this will then bring the heat and smoke back across everything on your grate, allowing for motor even heating.
An insulated blanket works wonders if you have a cheap flimsy cooking chamber as well.
Gaskets. Aluminum foil works, fireplace gasket is better and fairly cheap. EVERYWHERE you see smoke leaking out, put gasket material. You want to keep as much air in as possible.
Better thermometers. Probably the most important. Most barrel smokers have a stubby thermometer in the lid. Useless garbage. You're not cooking against the lid, you're cooking on the grate. Get a thermometer for the grate. Something like my dual probe maverick, or even a cheap digital that specifically sits in the middle of the grate.
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After that, do some dry runs. Put all your thermometers across the cooking surface, and do a full 6-8 hour cook with no food. The goal here is to find what settings work to get within about 10 degrees side to side across the cooking area. You will have to make some adjustments. It's much better to learn when you're not relying on the fire to cook your dinner or for a party. Keep track of how much wood, how often, what adjustments you make as the day goes on.
Think of a smoker like a welder. They're all a little different and they all like slightly different settings even for the same material. Much like a welder, once you learn what works with your specific smoker, you can just set it up and go. Sure, you can pull a welder out of a box, plug it in, and do what you saw someone else do and maybe even stick metal together, but you won't be making picture perfect solid welds without practice and machine adjustments.
With time, modifications to the smoker and the person in charge of it, you'll get to where your stick burner is almost as fool proof and leave alone as a pellet smoker. I'll acknowledge I have put a literal ton of pork through mine to get to the point with it that I am, but for just doing a couple of butts, I'm 8 hours from start to finish, add wood 4 times, and it comes out prefect every time. From mid April to late November I don't really even need to look at it anymore.
Which brings up what should be rule number 1.
IF YOU'RE LOOKING, YOU'RE NOT COOKING
unless you're adding or removing meat, leave that lid SHUT. It takes a lot of time to stabilize the temps again after you making a giant hole and let the heat out. Like 20-30 minutes every time you open it, that can stretch cooks into eternity. Even further than the stall/temp plateaus will stretch. Save basting and mop sauces for grilling.
If you like, I can cover dealing with stalls and the science behind them, as well as working through them.