Walkin Art can be installed on the Playa. When you arrive and are ready, go to the Artery, it is located on the Esplanade about 6:30. You will be asked to fill out the standard art application and the flame effects if your art uses fire. The Artery will assign you a spot and a member of the Artery will take you to that spot and mark it for you.
It is really not a difficult procedure. If you are using fire, there will be a separate table where a member of the FAST team will be there to answer any questions you may have about open flame or flame effects.
Each year quite a few installations are walkins so this is nothing new. If you have early arrival, the Artery will be open for at least 5 or 6 days before the Event opens to the public.
Those who think they can and those who think they can't are both right.