X - Sherri Cassara Designs: Newland Barn Wedding. This might be a good idea. Get some cheap blankets in the early spring. I don't think it'll get that cold at night but I want people to be comfortable.
Number RSVP cardS and log who has which number on a spreadsheet. Easiest way to track who still owes you an RSVP. When you don't get them back (and there will be many that you won't, its just how it goes) you know exactly who to confirm with.