Unfortunately the FAA requirement to register has been reinstated and the bill has been signed into law by the President of the United States. For any questions you may have use the link provided below to the AMA website which has a questions and answer forum. Please note this means that in order to fly at the field you will need both AMA and FAA registration or you will not be permitted to fly.
http://www.modelaircraft.org/aboutama/faa-uas-faq.aspx