The Ghouls family

I really don’t get how a post card would indicate his family is still alive. First wouldn’t she have to go to Colorado then back to Vegas to leave the card and then go to Colorado again makes no sense cause how else would it make it there. Second it said Colorado was a good idea meaning it happened in the past. Third depending how long ago the pods opened they’d be dead of old age.

Irrelevant to the first part but do you think his search will lead him to the enclave head quarters we saw in the mountains?