Carl,
Next time you are smoking something else, toss a peeled, quartered onion and some peppers (bell, jalapeno, etc) into your smoker near the end of your cook. Let them go so at the end of your cook. Allow them to go for an hour or so. Allow those to cool, chop them up, and store in your freezer. Most dips use those ingredients so you can just add some to the recipe next time you make your favorite. You could also smoke a block of cheese and grate that into your dip...
Regards,
John