During the summer, you could move the cyms, catts and dens under the shade of the oak. And then set up the GH to house the paphs & phrags.

In the winter, everything goes back into the GH for frost protection.

In my own growing area, the cymbidiums absolutely hate my greenhouse conditions in summer (hot & humid) and end up with rotten new growths. They only go into the GH during the winter.

Cerveza is always a must - no matter where you decide to place the orchids and whatever season it is

I have always been tempted to get cool growers, but I have accepted the fact that cool and warm growing orchids cannot mix well in my warm-oriented GH.