I presume you are refering to WBCCI. (or whatever its name will be next year).
Most local units have at least two buddy rallies a year where anybody can be invited to attend (even some SOB's) SOB = some other brand. I would suggest you contact the membership chairman of your local unit so that he can invite you to attend a few rallies to gain knowledge, to see if you want to join. He/she will also give you a sample copy of the club magazine (The Blue Beret). You can usually find his name by looking at the club website at this link. http://www.wbcci.org/
If it is not listed, he usually has given it to the local Airstream dealer who will be happy to put you in touch. If you post your address here I am sure another WBCCI/forum member will be happy to direct you.