How to divide a bed 13' x 10'?

       

Help needed please.
For the past few years I've been growing in these bottomless "tubs" - first potatoes, then courgettes. This year the courgettes have been rubbish but the unintentional spuds, have been OK!! The soil in the tubs is exhausted and there are weeds growing in and under the tubs that need removal.

I've decided to do away with the grass path between the beds and make one huge bed, emptying all the tubs of soil into it.
I now have a bed measuring 13' x 10', with the 13' sides on the North and South, the 10' ones on the West and East. The bed slopes from North to South, there's a small apricot tree on the North side and the East side is under a big old ash tree.

I want to divide the bed into sections with cardboard "paths" for access but I'm struggling to decide how to divide it and how wide each section should be.
For example, it could be long beds running N/S or E/W. 
Or square yard beds. 
Or 4 triangles with diagonal paths from each corner.
Or Vinny's Fishbones.

What would you do?