It's interesting that Idaho is spoken as Eye-Dahoe. So maybe its a regional thing and not whatever the reel was purporting it to be
But the pronunciation difference between Indiana ("short I", in-dee-ANN-uh) vs Idaho ("long I", EYE-duh-hoe) isn't necessarily meaningful.
The letter I just has multiple common pronunciations in English, which I'm told is confusing for learners!
It's interesting that Idaho is spoken as Eye-Dahoe. So maybe its a regional thing and not whatever the reel was purporting it to be