EMT winter frame
I went to electrical wholesaler (Nedco) and got a bunch of 3/4 conduits (7/8 ouside diameter) to make a frame. They are galvanized so resist rust. The whole frame was secured by truck tie down. You can actually swing on the frame. Home depot sells 30x50 white tarp for about $80. I laced it very tight so it won't flap in the wind. We had a lot of snow and very strong wind (+50kt) may times this year. Everything is still ok. White tarp seems to let in enough light to keep the solar vent turning. I have a 13W solar panel to keep the batteries charged. By the way, I always remove the life line and stenchion.