Try an XPEN. Easy to collapse and you can make it any shape to fit where you want to to go.
During Hurricaine Ike, when we evacuated Houston, we took the XPEN and put the kids in it so they wouldn't ruin the carpet in the motel. As it was, it was a wasted effort because the power went off and the water came in and the whole carpet was soaked...ROFL
and mildewed before we could return home....
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I say an XPEN because it can be used again and again, like when someone tied two little dogs to our porch railing and I brought them inside because it was cold. We were able to keep them seperate from my guys.
Louise