Thanks for your question! We don’t have any specific data around the movements of people in Cape York, but in general many people leave Cape York during the wet season (November to April) as the intense rain means that many parts of the Cape become flooded/washed out and leave many areas inaccessible and isolated.
When on Country during the dry season, groups such as rangers may spend their time in a variety of locations so a mobile freezer solution could be useful, particularly if it is independently powered, and could also be taken off Country during the wet season.
Mobile systems do have design constraints that come with travel on the rough roads of Cape York, so keep that in mind as you progress with your design.
Hope this has been helpful, good luck with your design!