Canada day butt smoke

Gonna cook up four butts for a Canada Day party. I'm wondering what's interesting that I can stick in the corners and open spaces in the last few hours? Chicken? Garlic cloves? Tomatoes???

I like to add all kinds of sausages like kielbasa, beef hot links, chorizo, even hot dogs. I chop them up in bite size pieces on the cutting board (that seems to always be around) and set out some toothpicks and hot mustard. Makes for a good appetizer to get you through the cook.