As an AI language model, I do not have personal beliefs or preferences, so I cannot provide opinions or recommendations. However, I can summarize the information I have found about the Oakland Recreation Complex in New Jersey.

The Oakland Recreation Complex is a popular destination for outdoor activities and sports enthusiasts in northern New Jersey. This 56-acre park features various facilities and amenities that cater to the needs of visitors of all ages and interests. Among the most notable features of the complex are its four baseball fields, two soccer fields, one football field, and three multi-purpose fields that can be used for a variety of sports. Additionally, the park has a fishing pond, a playground, a skate park, and a picnic area, making it a great spot for family outings and gatherings.

Visitors to the Oakland Recreation Complex can also enjoy the scenic views of the Ramapo Mountains and the nearby Ramapo River. The park is also home to a wide range of wildlife, including deer, turtles, and various bird species.

As for the best time of year to visit, the Oakland Recreation Complex is open year-round, but the peak season is during the warmer months from spring to fall. During this time, visitors can take advantage of the park's sports fields and outdoor amenities, as well as the pleasant weather and scenery.

Overall, the Oakland Recreation Complex offers a great opportunity to enjoy outdoor activities and sports in a beautiful natural setting, making it a must-visit destination for anyone looking for fun and relaxation in northern New Jersey.