I forgot to also say "Thanks for posting these photos!". It is always great to see old time photos of Airstreams in use!
I have a few more tidbits of information for you. Your grandparents, Louis & Gladys Shinn, #10718, were in WBCCI through 1988. They probably joined when #10718 was first assigned in
1964, but I am missing membership directories from that time period to confirm. The first directory I have that lists them is
1966, which reflects membership as of 12/31/1965.
They are listed as having participated on two official numbered caravans:
- 62 - Yucatan February 1969
- O8 - Great Britain 1977
That European trip is still early enough that they may have still shipped Airstreams overseas for it rather than the later overseas caravans were they would fly over and rent RVs (typically class C motorhomes).
I find no record of the Shinns having participated on an official 1973 Caravan to Central America, so it must have been a trip on their own, or else club records are not complete. Here are the official caravans that went to that area in 1973:
- 90 - Mexico Guatemala Winter 1973
- 91 - Yucatan Winter 1973
In any case, please continue to share photos. It must be great to have such a rich family travel history!