Anything other then clam brand? I know the clam brand is good but they are also expensive. Quility is there so I'm not saying its not worth the money just saying I don't think thats what I need. Also would prefer one with a floor not sure if all the clam style tents have no floor or not. I could have sworn I saw one at the expo that had a floor.
If you go onto Amazon you can see a few "other brand" clam style shelters, but AFAIK they may actually be made by Clam and just sold under another name.
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There are several people in our camping group who have Clam shelters of various sizes and they love them. Super quick to set up and very rugged.
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As far as cost, you get what you pay for. I don't know of any low-priced knockoffs of the Clam, even the non-Clam branded ones are going to be pricey.
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The Clam shelter without a floor is great for staying warm in cold weather. Back in July we went on a camping trip above Fairplay, CO. Our campsite was at about 10,800'. Unfortunately, that weekend we were in the middle of a 5-day monsoon rain. It was rainy and cold all weekend. We didn't have our Clam that weekend but one of the other people in our camping group did - they had the 11' x 11' 6 sided one. They set it up and then put the Propane campfire in the middle and it stayed nice and warm - made a great place for meals and gathering!
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We got the 12' x 12' Clam shelter with the attached side panels (on the 11 x 11 model, the side panels remove completely, the 11 x 11 model comes with 3 side panels and if you want to cover the other 3 sides you have to purchase those separately.) The only "complaint" I have about the Clam is that even folded up it takes up a lot of room! The case for our 12 x 12 Clam is probably almost 6 1/2' long! It is super easy to set up, but if there's any wind at all you will want to stake it down well.
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Speaking of wind, we have had people camp with us in heavy winds and the Clam resisted the wind quite well (and no broken poles!)
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Overall I would say the Clam is one of those things that if you really NEED it, then it's worth the money.