in my experience, the ONLY hard part is removing hoses
In my instance, i did not disconnect the hard tube on the left of the heat shield. I tried to very carefully pull it back while lifting the valve cover off.
I was extremely worried about tearing the 90 bends, but it seemed to be ok.
I'd recommend trying to remove the 90 bends as described in step #1.
The other hard part for me was breaking loose the 3 way tube on the back of the valve cover. I used a flathead screwdriver to carefully pry around it to loosen it. Once it was off, it was easy to get back on and off again.