Frank,
After losing most of my potted trees last winter for lack of a simple heat source, I have already planned and laid out the storage area and multiple backup heat sources, just in case.
The in-ground plants will be pruned back to 2 nodes above ground level and covered with Pine Shavings. Last winter all branches below the Pine Shaving mulch survived without injury.
Rafed,
Draped, overlapping flaps may be the simplest to fabricate, with access from any planned point.
Rafael,
Regardless of the predictions, I plan on being prepared : )
The vortex last winter took us by surprise.