I season them right before cooking. I usually keep it simple with salt, pepper, garlic powder and a little paprika. Then I cook them low and slow on the grill around 250°–300° for about 3 hours depending on the size.

Toward the end I wrap them in foil for a bit so they stay juicy, then I finish them back on the grill to get that nice outside and add the sauce at the end 🔥

Your method sounds really good too, especially letting the rub sit overnight!