I am currently using a box blade to do exactly what you are doing. I have about an acre that bounces me all over the place. I've done about a quarter of it and it is noticeably smoother. It will take me a while, but I'm using it as learning what I can do. I have clay soil with some basketball + sized rocks and a few small tree stumps that have stopped me abruptly. I'm thinking that there is probably something that might make things easier, but once the project is done, I will have no need for the rake, plane, or anything else that I would need to buy.