Kristinn, there's a big grand opening gala of the new Museum of the American Indian that day, with a tribal procession and opening ceremonies from 12 to 1. You might want to see if that will hinder what you are doing, or whether your protest will get lost in the coverage of the other event.
Thanks for the info on the museum opening. We should be okay. I wouldn't expect alot of press coverage if it were just a normal day in D.C., so if hardly anyone shows up to cover this it'll be par for the course for us.