Should you follow the advice of above, you might be aware that if (1) your show is AMA sanctioned and administered by an AMA CD then all fliers MUST be AMA members. (2) If your club charters under AMA, then all club members must also be AMA members.
If you join AMA then you will have a back-up secondary protection. A CD can obtain primary protection for the landowner. Simply consider the options, the pros and the cons and take your choice.

edited to add (2)