Hopefully your breeder will be sending a blanket home with him that has his mom and littermates scent on it.
Just in case, bring some of his bedding with you. If the breeder isn't doing that, just rub the bedding all over him, his littermates and the mom so it gets all those familiar scents on it. I truly believe that helps with the transition.
Good luck with your new little boy. When people get so excited like you are, it makes it so much easier for us to let the puppies go; we get so attached to those little buggers!