Well...I suggest, since you are inexperienced with using a smoker/haven't smoked ribs in your smoker to date, to cook them on your BBQ for your party. Better odds of success from my experience.
Get some quality pork back ribs; trim them of thick fat and peel the thin membrane from the back or bone side of the ribs.
With a mortar and pestle or sacre-bleu a food processor: Mash orange peel (just the orange portion...not white pith), kosher or course sea salt, black pepper, good rosemary (I prefer fresh but dried is OK) and fresh garlic to a medium course paste (fennel seed is another nice addition to this mix; ditto for a little crushed red pepper flakes, etc.). Add enough olive oil to thin/make spreadable.
Rub a thin to medium thick coating onto the meat side of the baby-back ribs with the above paste; wrap with stretch wrap and let sit in the fridge overnight or at least 4-hours or so. You'll want to set the wrapped ribs on a cake sheet pan or similar to catch any juices that escape
Out of the fridge about 2-1/2 hours ahead of serving time. Let the ribs stand at room temp about 30-minutes or so before taking out to the BBQ.
I like to first grill the ribs, flesh side down and then the remainder of the cooking time with the bone side down, over medium heat just to get them up to temp and slightly caramelized. Then indirect cook them over low to medium heat for about 90-minutes; lower temp and longer time is mobetta...don't hurry the process
If you prefer moister ribs you can also, after the above grilling process, double wrap them in foil and let them sit in a low temp oven or if using a gas grill you can leave them on the grill, wrapped in foil, with the burners off...so just using residual heat, for up to an hour. The texture changes...and I prefer not wrapping but your personal tastes dictate! Just remember to back up your start time to account for the foil wrapped resting time!
Then after your party start experimenting with smoking ribs/meat in your smoker...its going to take you some time and experimentation to get decent smoked products out of your smoker.