RE: Indoor flyneed AMA
Stan may well be correct on that point but you will not be able to obtain an insurance rider naming the property owner as a primary insured unless you do go through the additional insured process he described and pay the fee or go the sanction process.
Our club has provided public static displays and some years flying displays at the municipal full scale airshow for some years and I served as the CD as an easy route to obtain the AMA class D (display) sanction and the all important insurance rider naming the Airport Authority without which we could not participate.
If your property owner does not require this covering his liability then you are on your own of couse. Historically the ability to obtain these insurance riders naming property owners as primary insureds is a key factor in obtaining any location for any events or displays or even flying fields. One of the two ama methods above have been the simplest methods of doing this.
I wish you well with your event or happening and admire your enthusiasm.
John