Here is the completed plan for the main garden....east north and kennel gardens all connected. Click on the photo to enlarge.
I've already changed my mind about the "zucchini tower" in the north garden. I've decided the small west garden (not shown)would be a perfect spot for two zucchini plants. It's in an area that isn't drenched by the lawn sprinklers, right next to a faucet where drip tubing can be attached. Maybe I can finally grow zucchini that isn't plagued with powdery mildew.
I still have the 12'x12' area behind the garden shed. I think I'll reserve that for leftover tomato plants...knowing me, I'll have more than a few of those! Tomatoes (in buckets) will also be placed around the main garden, and secured to the fence posts, as well as next to the garden shed and the patio. I'll probably have about 10 tomato plants in buckets, plus the four indeterminates in the north garden and the cherry tomato next to the kennel garden. Fifteen plants sounds like a reasonable number.