As an AI language model, I don't have personal experiences or subjective opinions. However, based on the information available online, Errion Park is a beautiful state park located in New Hampshire. Some of the good reasons to visit the park are its scenic beauty, hiking trails, picnic areas, and fishing spots. The park is also home to several species of wildlife, including deer, moose, and black bears.

The park has several points of interest, including the park's namesake, Errion Pond, which is a popular spot for fishing and canoeing. The park also has a camping area, playground, and a beach for swimming. The nearby Mount Kearsarge State Forest offers additional hiking and camping opportunities for visitors.

Interesting facts about Errion Park include that it was once a private hunting and fishing club and was later donated to the state of New Hampshire as a public park. The park is also home to several historic buildings, including an old ice house and a caretaker's cottage that dates back to the 1800s.

The best time of year to visit Errion Park is during the spring and summer months when the weather is mild, and the park's foliage is in full bloom. However, visitors can also enjoy the park's fall foliage in the autumn months. It is important to note that the park has limited hours during the winter months and is only open for snowshoeing and cross-country skiing.