Recovery boxes.

[stormlion1]

You also have to remember that most of the gear could be prepositioned without being hidden. Remember the teams were going to be awoken 3-5 years after a nuclear war not 150 that happened. So it could be thought that construction equipment, raw materials, or trailers full of goods could be left out in the open for some time. Parking Aircraft in the desert for a few years sealed wouldn't even be an issue. But after 150 its all scrap.