How Do I Research My Trailer History?

[SUEHOWIE]

I am the proud new owner of a 1957 Custom 26 foot Overlander. It is a CA model. I am curious how to research the history of it-if it was involved in any caravans, etc. I know the last 12 years it has been sitting on a campsite in Elma, Washington. There is some evidence via a sticker on the trailer that it spent time in Oregon as well, so it has made its way up the Pacific coast over the years. How can I go about tracking this?

Thanks,

Sue

1957 Overlander "Kalea"