Topic: Help with I-485

First time so not sure if this is right way to put this in. My wife filed I-130 for me back in March this year. I am living in NZ and planning to travel to US in August to file I-485 as the PD is going to be current. I have received the NOA1. I am preparing my I-485 pack now. My wife is currently in NZ and has a Travel Document Re-entry visa. I have a few questions: Does my wife, as petitioner, have to be present in US when I file the I-485? I can enter US under Visa waiver program as visitor. Should I apply for dual intent visa when I arrive in US? After I file the I-485 can I travel out of the US and return again when the appointment is made for the Biometrics? Should I apply for EAD/AP at the same time I file the I-485? to make the travel outside the US easier? Thanks Monty