Hi John,
If you have any interest in the Clam, then you should take a look at Gazelle. They are a little smaller than 10x10 and stow at 63 inches long and are considerably cheaper than a Clam. We have one and the only downsides I see are that it is floor-less and the screening blocks most of the wind, so summertime you need a fan. The screening does block out insects very well. The Gazelle pops out just as the Clam does, very easy setup and take down. The hardest part is getting it back into the bag π
John