I have already sent out most of the STDs for my May 2013 wedding (on the early side because I had a few people tell me their employers require them to plan vacation time this far in advance).
Since they are not the formal invitations, I didn't think much of it and just addressed the them to couples when appropriate, and single friends alone.
However, when I send out the invitations, I plan on giving all the single guests a plus one, as the wedding is OOT and I think most people would not enjoy traveling alone.
So to allow people to make travel plans, should I tell them now that a +1 is OK?