Parking recommendations:(Add your recommendations below, with date used for time reference, add username so others can PM for more info)
Cheapest currently is onairparking.com at $4 per day. Feel free to use link to get $5 off
https://www.onairparking.com/CouponCode/abraham7031WallyPark - Paid Groupon cost + $8 for tax at location. Shuttle there and back easy, and no long waits. I made a reservation
here before arriving. (Oct 2017) - tageed-lee
(full review here)Jiffy - Setup an online profile BEFORE you reserve, and you will get one free day.
Groupon - Two or Four Days of Indoor Parking near Newark Airport at SNAPI found
Way.com to be the cheapest and easiest way to book, they always have promo codes you can find online.
Ive used them to book AirPark which was the easiest and nicest company and parking lot to deal with and Jiffy which is also good. (Aug 2020)