We have clay soil too (there have been local clay mines) I thought your digging out of the under the rasied beds is a great idea. And the best part is that if you post how its going i can see how it is working before we start ours. We are in northern Idaho and i have serious weather envy with the pics of no snow on the ground and things not frozen. What type of set up are you doing with your aquaponics?
Te