I think a cheaper alternative is to only allow access to non-sensitive information when initially logging into the device, then hide any substantial information behind another layer.
Don't think the average customs officer has time or skills to dig out files containing encrypted volumes on your device.
The average customs officer will not do that. But they will potentially take an image of the hard drive (possibly by removing it and connecting it to an imaging computer) and store it, after which people/programs with both the time and skills can find your hidden data.
Don't think the average customs officer has time or skills to dig out files containing encrypted volumes on your device.