How about doing the castle at the top with the beanstalk and set the camera position then save that file, call it J&B1. do the bottom section with the farm in it using the same camera position. Once you have done that then just merge both files together by going to file/merge and clicking on don't save when you get the pop asking you what you want to do. Don't worry you wont lose anything when you merge and click on don't save..I have done this in practise because i have seen it mentioned before :)

I have opinions of my own -- strong opinions -- but I don't always agree with them.