Cooking 8 leg quarters, 8 baked potatoes and 8 ears of corn, all at the same time, could be a bit challenging, even on a 26. I'd probably do the corn and potatoes first, getting them almost done and stack them as far from the heat as possible. Add coal, if necessary, and put the leg quarters on. Use your charcoal baskets, or pile your coals on one side of the kettle and cook indirect. Cooking indirect, at about 375*, it should take about 1.5 hours total cook time.