RE: Rocket gliders
Depends on the design. Dumas, Cox, Estes, Edmunds Scientific are some manufacturers that make ARF rocket gliders. These fire off like a standard rocket and then you fly them down like a normal glider. As long as they are powered by a commercial class C engine, normal AMA rules apply. However, because they do require a standard launch platform, some clubs may not be equiped or experienced to handle these types of gliders and may not let you fly them unless you have some experience.
Being in California, you should have access to a number of NAR and Tripoli clubs in the area. These are the guys you want to talk with. They have a membership system like AMA, and also can hook you up with clubs that will assist you in training, and if you really want to get into the hi-tech stuff, get you the proper certifications.
Scott