We are having a small wedding and I've had many of my invited guests ask if they can bring their significant other or a friend with them (most of them are driving a few hours to get to the wedding, so they need a 2nd driver, etc). I am completely fine with these extra guests coming, my only concern is- how do I keep track of them and how do I get their names? Is that something I should include on an RSVP card when I send our invites? Like, maybe add an extra line for them to fill in with their guest's info? I'm just not sure how to go about this. Any suggestions?