High Tunnel

I'm beginning a permaculture high tunnel. It will be large. 96x30 and 15 ft high. Any ideas or links to others who have done it?  Thanks.  I'm in zone 4.

Thanks. I'm more interested in plant layouts that have worked. I've got the plants. My nursery www.jiovi.com specializes in cold weather permaculture plants etc. I'll bet I'm not the first to plan a plan an integrated food forest inside but maybe I am.  My dream is a system incorporating annuals,perennials, and animals (birds maybe?). I plan on using a climate battery to extend the extended seasons in the tunnel.  

The only book I can think of that discusses internal layout is the "The Forest Garden Greenhouse--How to Design and Manage an Indoor Permaculture Oasis"
by Jerome Osentowski.

In the book, the author discusses the green house versus the hoop house--including the fact that a hoop house can only be enlarged by extending its
length and the need to design for snow loads.

He keeps over 150 varieties of plants,vegetables,and herbs all year round in his outside permaculture forest.  He uses his greenhouse to grow plants
from the tropics and the Mediterranean.  He also grows vine plants like grapes, peas, beans, and cucumbers on trellises.

This book may not be applicable to you either, if what you want to do is "season-extend" plants that already grow in your climate zone