As promised, here's a photo of my frost blanket/EMT hoop setup.
When I took this photo, one side was open. The bed on the left is my "ready-to-go" tomato bed. I also included a photo of my tomato seedlings outside today ~ I grab everything and anything I can set them on so it's nothing fancy.
And here's a close-up photo of one of my tomato seedlings in a soil block.
~ April the Artistic Gardener