Yeah, that's it, 58L-Y8. Good eye.
Yeah, TerryB, it was cozy. Fortunately we had a relatively small family for the 1950's, only 5 kids. I'm pretty sure the two oldest kids slept in the station wagon, leaving only 3 kids and my parents crammed in the trailer. Nowadays this type of "vacation" would be considered child abuse. I remember this vacation well and it was more like parent-abuse.