Doesn't sound like you need additional status miles to reach an elite level, so I don't quite get the point of doing additional flying on 12/30 unless you could find some incredible cpm that would allow you to economically accrue RDMs. If this were for January 2010 travel, I could see the point. Also don't think you can get too far from IAD if you need to return later in the day so even if you managed 3 or 4 segments, it still wouldn't add up to many RDMs.