In reading one of the links J_R posted I may have gotten a bit dizzy and missed the part where the AMA covered you flying anywhere except in a sanctioned AMA Club field or the airspace directly over your house.
Where does it say you MUST fly at a sanctioned field??????????????????????????????????????
There are a good many of members who do not and cannot drive loooooooong distances to an AMA field. IT IS NOT IN THE RULES! that I am reading