After researching into this idea, looking at costs and how we would actually go about setting it up, it became clear the tunnel aspect would be quite difficult. We didn't know what it would be made out of, we were thinking a poly tunnel:
But they're not very safe, or particularly aesthetically appealing. So we then we had the idea of using shipping containers, I found some flatpack ones that fold up so it would be easy to trasport them around
If we had a couple of these exhibiting work, I think it could work quite well. Shipping containers have been used a lot for creative uses: