Anyone interested can come out and try their hand at aircraft flying out without joining anything. The AMA program is entitled the Intro pilot program and is intended to get people introduced to RC airplanes without the expense:
Under the AMA Introductory Pilot Program, a non-AMA person may receive lessons during a 60-consecutive-day period under the direction of a designated AMA Instructor. During supervised flight instruction, liability insurance is provided for the trainee for a 60-day period but only at the club site. Though the trainee will not receive a membership card, he/she is considered a member of the Academy while under the direct supervision of the currently registered designated Introductory Pilot. Introductory Pilots are charged with the responsibility to ensure that the trainees’ activities will be conducted in compliance with the AMA’s National Safety Code(s).