my dad had one of these when I was growing up. we went camping in the Wyoming wilderness with it.
if you shut all 4 doors at the same time, the squeaks made a chord. https://image.nostr.build/ded7ca7dacac07eb5095f84f544a1766ab6ede29bc79af610fff1fc187bb1f25.jpg  

 you've mentioned this! man what a beautiful memory, i may rent one just to take the kids somewhere wild