Haven't used it at Newark but the Parking Spot app has always been fantastic. Download the app, reserve a spot. They shuttle you to the airport and pick you up. Heck you can even plus up to a car wash.
Airport Parking & Reservations | The Parking Spot
The Parking Spot makes long-term near-airport parking a superior experience. Pre-pay to reserve your affordable and comfortable spot with us today.www.theparkingspot.com
Huge difference between a Pensacola carwash and a Newark carwash.