the Aleutians are a better choice.
You want warm. If you put them some place cold they have to have heat. If it is warm you just have to have shade. Midway would require water rationing food would be expensive and housing would have to be imported as there is literally nothing there but a runway.
The Aleutians are also less remote and easier to see family and friends.
They also have scenery.
I want a location where they have nothing to look at except the ocean. No where to go except to bed and no cultural or normal leftist type activities. Make them home school their kids in the middle of nowhere.
There are no bears on Midway and other than typhoons it is not a dangerous place but it is very, very remote.