RE: Is the AMA really worth it?
First, to fly with most organized clubs, it doesn't matter if the AMA is good or bad. Club rules require AMA membership. For an established club with a flying site, equipment and over a handful of members, the AMA is extremely necessary for the insurance coverage provided. Don't be fooled by some saying homeowner's insurance will cover this activity. Each policy is different and many require a special rider for R/C flying. Also, check your homeowner's company track record. Many companies have been known to drastically increase rates or cancel a policy altogether for even a minor claim.
Do you own the field you fly in or does someone else?
If someone else owns the field, do you have their written permission to fly there?
Is the owner of the field aware that your R/C hobby is not covered under any type of liability insurance?
Dr. 1