The Arbor Day Foundation has been working to bring back New Jersey's tree line in the aftermath of several recent natural disasters. The New Jersey Tree Recovery campaign partners the foundation with the New Jersey Forest Service. The partnership has distributed over 300,000 trees, but many more are still needed, according to the Arbor Day Foundation.
A link to the PDF which contains pickup locations & times plus a "How to Plant a Tree Seedling" infographic is available here: https://nj.gov/dep/parksandforests/forest/docs/tree_recovery_nj_pickup_locations2022.pdf