I'm sorry, but there seems to be some confusion. Nelson Dewey State Park is actually located in Wisconsin, not Louisiana. Here is a summary for Nelson Dewey State Park in Wisconsin:

Nelson Dewey State Park is a beautiful park located in Cassville, Wisconsin, along the Mississippi River. The park offers a variety of activities for visitors to enjoy, including camping, hiking, fishing, and picnicking. It is named after Nelson Dewey, Wisconsin's first governor.

Some specific points of interest in the park include the scenic hiking trails, which offer stunning views of the river and the surrounding bluffs. The park also has a boat launch and fishing pier for anglers, as well as a picnic area with grills and tables.

One interesting fact about the park is that it was originally developed by the Civilian Conservation Corps (CCC) during the Great Depression. The CCC was a federal program that provided jobs for young men and helped to develop public parks and forests.

The best time of year to visit Nelson Dewey State Park is in the summer and fall, when the weather is mild and the foliage is at its peak. The park is open year-round, however, and offers snowshoeing and cross-country skiing in the winter.

Overall, Nelson Dewey State Park offers a great opportunity to explore the beauty of the Mississippi River Valley and enjoy outdoor activities in a peaceful, natural setting.