While there's no official ranking, your best bet for easy parking is usually at a Motor Vehicle Commission agency with its own large, dedicated lot. These are typically found in more suburban areas.
For example, the locations in Rahway and Flemington are often cited for having ample, straightforward parking. The Turnersville agency is another good option, situated away from a dense downtown area.
You'll likely face the biggest challenge at agencies in heavily urbanized centers where parking is scarce. For any location, your experience will almost always be better if you can go mid-morning or mid-afternoon on a Tuesday, Wednesday, or Thursday.
For the easiest parking, your best bet is an NJ MVC agency located in a large suburban shopping center. The Lodi location is often cited as a top choice because it shares a massive lot with retail stores, so finding a spot is rarely an issue.
Similarly, the agencies in Wayne and Rahway are known for good access, as they have their own large, dedicated parking areas. Just remember that a quick park does not always guarantee a short wait once you get inside.
Pinpointing the one New Jersey MVC with the absolute best parking is tough, as availability can change by the hour. However, your easiest experiences will almost always be at agencies located within large suburban shopping centers. The Wayne MVC, for example, is part of the Preakness Shopping Center and shares its massive parking lot, so finding a spot is rarely an issue. Similarly, the Lodi agency benefits from being in a shopping plaza with plenty of spaces. These locations offer a significant advantage over urban centers or facilities with small, dedicated lots that fill up quickly.