"A few years ago I got tired of laptop fans that slide around, and didn't cool very well. This was my husband's solution. $10.00 clip fan, red duct tape, and an old foam wedge laptop desk. Best fan I have ever used."
Someone I know has had their pc bungee corded to a running window fan all summer. I asked them about what they do when it rains, when the wind blows in the rain, and they responded that it never occurred to them. They did finally take it down for the hurricane.