I have a 2007 18 inch grate Jumbo Joe (AKA Smokey Joe Platinum) It is set up like a current smokey joe gold because it has side vents and a lid bail. I set up a homemade "hovergrill" by taking a 14 inch smokey joe grate and creating legs with carriage bolts, washers, and nuts. This gives me two levels for indirect cooking. When I camp/travel I have cooked pork shoulder, chuckies,meatloaf, abt's, moink balls, whole chickens, chicken thighs, chicken wings, and turkey breast. I have direct grilled items like steaks, burgers, salmon, shrimp, brats, etc.
My family loves the vacation food I produce and we very seldom go out because of it. With a little planning a lot of food can be cooked on an 18 1/2 inch kettle. Long story short, I suggest trying the current version of the Jumbo Joe. It is a little different than mine as it has a shorter bowl and a bottom vent. I would figure out a hover grill and get some charcoal rails for indirect cooking and then get crazy with it! I like the hovergrill concept because I can do two full family packs of wings or thighs and just rotate the top grate chicken with the bottom halfway through cooking. I can then feed a pretty good crowd in a camping/tailgating situation.