Excellent input Ed! BTW, love your avatar! As for me and my house, we will serve the Lord!Are you planting in regular rows or wider rows or beds? 1600sqft is a lot of ground to cover. Wider rows/beds will allow you to put your organic materials only on the growing area. 16 wide rows or beds that are 20'x3' with roughly 2' paths between would fit on the 40x40 plot. (I would cut the long 40' length half by a path bisecting the rows/bed, thus the sixteen 20' rows). Going with the scenario that I laid out would create a growing area of roughly 960 square feet which would save a ton (possibly literally) on organic matter, water, etc.,. Of course, you may already be doing this, but it seems you're talking about adding things to the full garden area. The wood chips might work really good in the paths. Just some thoughts.
Best wishes,
Ed