US Federal Government Sites to Help You out

https://www.recreation.gov

This is where you must sign up to reserve a camp site or other lodging controlled by the US Forest Service. It's easy to sign up and use. It shows both pay and free sites available

https://www.fs.usda.gov/ivm/

This is where you get information and an interactive map that you can choose your activity or just see what is available in your local area

https://www.fs.usda.gov/visit

Shows what all the US Forest Service Offers including Accessible areas for those with limitations.

https://www.blm.gov/visit

This shows the ways to enjoy federal lands. I wish this site existed back when I lived out in Utah and Nevada. It shows all the open areas to visit many of them are free use for camping