Polishing up an instructable on assembling a SoilCam means burying another scanner! In the process I realize I've had a 4 Port Plugable USB hub running for over a year outside, through a Michigan winter. Neat : )
This burial is in a tub that a year ago we used to grow potatoes. While still located outside, having it in a tub makes it easier to have inside which resolves having to worry about how you're going to get power outside. Though if portability is required, a five gallon bucket would be a better option (soil is heavy!) and would still fit the scanner.