Good idea contacting the GW, for all you know, someone stopped, or dealt with someone hauling a blind that fits your description. Likely the same ones that hit you last time.
I have used 11-12 sq. bales of hay before, with a sheet of plywood on top, not nice, but gets the job done.
“Never be afraid to try something new. Remember, amateurs built the Ark, professionals built the Titanic”
Friends don't let Friends drink and post.......
The first 5 day's after the weekend, are the hardest....