Earlier this year I made a hinged hoop house to protect my plants from the dreaded cabbage moth. It worked GREAT, but I used scraps to build it. Here are the changes I made to it just last week. Better materials and a couple of other improvements.
Caterpillar Tunnels and Hoop Houses are great growing structures that have several similarities and differences. This blog post covers those similarities, pros and cons, and how to select which structure is correct for you