My immediate thought for the U-shaped one if you want to do crop rotation is to do a 3-year plan with the end and each side as a separate area.
Of course you U-shape might not be suitable for this idea, but here are a couple of web pages that might be useful is this interests you
~crop rotation~ Vegetable Crop Rotation: VegetableExpert http://www.gardenorganic.org.uk/scho...opRotation.pdf
You just need to find a plan that suits the veg you want to grow, without forcing you to grow / not grow certain things next year... unless of course they are things you would never want to grow in a million years... um.
Sit down with some paper and a pencil, make a list of all the veg you are growing and see if you can work out which ones go together... same family or same requirements or whatever. Draw diagrams and make lists, and cross stuff out and move it around until you have something that seems to make sense to you! I don't really know what I'm doing, this is just how I've approached it but it's my first year really - although I'm doing, more or less, a four-year system, because that's what My Book recommended, and I sort of have space...
If you have too much stuff to fit the space in a way that makes sense to you, then you could always use containers for the surplus e.g. I have planted loads of potatoes but have nowhere to put my tomatoes in the ground without messing up my rotation plan so I'm just sticking them in pots and vowing to think more carefully about how many spuds to plant next year!
Wish me luck and I'll do the same for you
