For the mayonnaise, we like Best Foods or Hellmann's brand.
If you make it with ranch (the traditional way) do 1 cup mayo, 1 cup buttermilk, and 1 packet of Hidden Valley Ranch dry mix.
For the barbecue sauce, we like to use Bull's Eye Original Barbecue Sauce. For a more smoky flavor, use Sweet Baby Ray's Hickory and Brown Sugar Barbecue Sauce.