1- A properly sized "footprint" fits under the floor of the tent and doesn't protrude beyond it, so it cannot collect water.
2- Better tents use non-stretch polyester guy lines instead of Nylon. It won't go slack when it gets wet. Adding shock cords to tent lines adds to the weight, complexity and maintenance of the tent, and doesn't solve the underlying problem of guy line stretch.
The Kayak Wing
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