Hi.
Unfortunately we don't sell tables for single days. It is something we've tried before but had very little interest in. However, you can share a table with someone, in much the same way as you share a room.
When filling out the dealer registration form there is a 'Sharing partner' field in which you just put the attendee number of the person you wish to share with. You will need to find someone willing to share with you, but once you do it's up to you and them how the table is shared, though if you do decide on a day each please let us know so that our Den map can reflect this.