I’m trying to mimick a cool, humid Pacific Northwest Microclimate in southern Idaho. Looking for advice on how to achieve this

I live in Boise, which is essentially a semi-arid high desert. Our winters are cold (Zone 7a) and are summers get really hot and dry (high 90s low 100s at it’s peak). I’m really determined to grow some iconic Pacific Northwest edible plants as my little hobby project, like Salmonberry and Thimbleberry, as well as some pretty ferns and perhaps some redwood Sorrel. In the first 3 photos, you can see the setup I had last year with the 70% Aluminet shade cloth. Then you can see some of the changes I’ve made this spring, like the rock wall on the southwest facing side.

Building a greenhouse is NOT an option right now. I’m pretty new to gardening, so I’m not even sure if what I’m trying to achieve is even possible. I would love some advice though 🙂