Hi, New Dad, and Congratulations!
My experience is that newborns are a LOT better travelers than toddlers...
My only concern would be exposure to contagious illnesses, as others have said.
Besides keeping the baby away from direct contact with strangers, you and your wife should take care to avoid picking up illnesses that
you could pass along.
Restaurants are the hands-down champion in that department, especially if you like uncooked foods like salads. (I used to be a Health Inspector, so believe-you-me, I know!
)
Avoiding that exposure is easy when you have your own traveling kitchen!
Francesca