Thought of this one last night. I will be inviting many friends from out of state. When I sent their STD - do I address it to them AND "guest" (if we are permitting them to bring a +1) or do STDs just go to the primary recipient?? I ask because if I was invited to an OOT wedding and wanted to make travel arrangements, I would want to know if I was allowed to plan to bring a +1. What's the etiquette on this??