Looks good and sounds practical. However, strong wind can get into the
"tent" through the open bottom and turn it over.
No opening should be present to allow wind in. The design should allow the
wind to go over the canvas shelter in a continuous flow.
In Canada, automobile snow shelters have a proven design for the height of a
normal car. They are design with about a ten degree slope on each side.
Soon as the height of the shelter increases so is the windage. Snow shelter
height enough for tractor trailer have been used with negative results, they
flip over, even when well anchored. The coin set design or pyramid approach
are better suited to reduce windage.

wrote in message
oups.com...
I have found a pretty smart looking company but have not seen too many
of their installations around. Seems like a fairly new product but was
wondering if anyone had thoughts on these?

http://www.duraports.com/products/marineport/

Please let me know what you think.