Nah. Froome just doesn't trust that Contador is clean and why would he, the pillock has already been caught cheating once. A bit more thorough testing at this stage, and Contador might not make the staring line of this years tour :)
Do Sky just cycle up the mountains though, or do they also rest up there? I thought the favoured training technique was to exercise at sea level but rest at high altitude (somewhat contrary to the popular myth).
I think you'll find the opposite is true. Froome is being trained to peak once per year, during the tour. If he was trying to win multiple events during the year he would be at a far greater risk of burnout. As it is, he's only trying to win one.