>>618078Read up on the history of the area. If you can find anything significant, include it. Find out what natives used to be on the land, and include that in your proposal as well.
Explore it and note the wildlife in the park. Try to map out some stuff if you can.
When writing, make sure throughout the proposal that you're selling the benefit of the park to the citizens.
Find politicians that would take up your cause. Look at records for who is friendly to such causes.
Good luck anon! What state are you in?