What is your budget? I would go with the condiment bar theme. Fresh onions, jalapenos, relish, two types of mustard, sauerkraut, pickles and some tomatoes. Ketchup is optional, but I'm sure someone will ask for it if you don't have it.
As far as hotdogs, Nathan's or Hebrew National are some top brands. You may want to check around with the meat counter at your local store to see if they make custom brats.
Team: Pyle's BBQ; Yoder YS640; Good-One "Trail Boss" 60T; Weber Kettle w/rotisserie ring; Big A$$ Rotisserie; Weber OTS; New Braunfels offset smoker.
Saddles BBQ Bistro