Tanzania is up on the wiki!!

We are mid-September in Africa. Tanzania just posted on the wiki with invitations for the 20th. I think that's mid-September. And Cameroon is still a possibility. Hopefully we can get legal clearance and get our invitation before the end of the month when we go traveling. What happens if you are away when the envelope comes? Do we have to have someone overnight the package to wherever we are? How does that work?