Welcome to PNP. No, you don't need to break it down. Post the request and the pilots will reply with how far they can fly (and may suggest airports). They do a great job of putting the route together.
You may not need an overnight, depending on what times the pilots are ready to start. If one is needed, you can work on that once you know where the last leg of the day will end.
So post your request and check the board daily for offers. Good luck!