Check on when all the trees will be in bloom as it will be gorgeous and uber would be a great way to do it I would think there is no public transportation to the location. Depending on where you are coming from you could take Marta to the closest point and uber from there. There are always creative ways to do things LOL
Uber would work. Depending on where you are coming from hiking is an option.
No. I don't think so.
Get quick answers from Stone Mountain Park staff and past visitors.