With a well socialized, good tempered dog you should not really have to do introduce a pup in a neutral area. When I used to have dogs come for show weekends, I just brought them inside my house. Only once or twice, because of the other dog, did I bother to do the introduction in a neutral place or during a walk.
Pups are not perceived as a threat to most dogs.
Have fun with your pup, looking forward to seeing pictures!