Hi Julia, I'm glad you found us.
I've used all the seed companies you mentioned and been happy with the seeds and results.
My area is very windy. I pack my wintersown milk jugs in plastic bins, holes drilled for drainage. Last year whole bins containing 6 to 8 jugs where blown away.
I had a brick in this bin with 16 oz cups, that was blown too!
Now I put 2 bricks in each bin and so far so good on that. This big tan thing works best- it holds about 20-25 jugs. (It's the bottom half of a dog cage).
Honestly, we've had trouble keeping a roof and siding on the house, so when I say "wind" I know of which I speak!
Karen