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For low and slow cooks, i find it more predictable and manageable when I use briquettes. They are uniform in size and burn more consistently for me. I use a weber kettle but I think the methods to charcoal are similar with a WSM
It will be interesting to see what other advice is posted
I am currently use briquettes as well and had the same thought process. I like the uniformity of the briquettes and feel they would be more consistent performing and slightly more predictable.
Briquettes have the advantage of consistency but their ignition can stink. You can get around that by starting them elsewhere like a chimney or a grill.
Only one great way to start the charcoal and that is with the weber chimney. After the ignition, I use the minion method which is where the briquettes work best for me
Natural Briquettes, here. Stubbs brand is all that is available near me. I used a lot of Kingsford blue before I stumbled on the natural rout. No big complaint against the Kingsford but the natural produces quite a bit less ash build up in the bottom of the smoker.
Weber makes a smaller than full size chimney.
I half fill the chimney and fire it up with a starter cube.
I put a tin can with both ends cut out in the center of the coal grate and fill the coal ring around it with briquettes.
And put the half chimney of lit briquettes in the can, pull the can out with a pair of needlenose pliers put the smoker together and your off and running.
Should have added; That I have not tried lump in my WSM. I've read quite a few reports from long time WSM owners who state that lump generally burn hotter than the WSM likes.