I was happy to read that he came home! It sounds like he may already have it figured out that he is at home. As far as how far he wanders I am not sure what you can do about that. We have several barn cats. Some are always within shouting distance but others, male, are gone for a few days at a time. I have been told if a male cat is fixed he will not wander as far.
You will also have to put it in an area that is protected from the weather, or put a tarp over the top and three sides of the crate, you will have to keep one end uncovered so he can get air. If the crate is to small when you let him out the next day he might run away and not come back. Good Luck hope it works!