Is it worth??? That is for you to decide....Are you joining it just for vacation benefits? If so, I will be honest and tell you that I could get a better deal elsewhere....I have never gotten a good deal with CAA (And I used to work there!). But then again, if you get a GREAT TA there, it might make all the difference in the world....And then if he/she could get you the discount and the deals that you are seeking, then yes, joining them may be worth it.
If you are joining them for other reasons as well, it may also be worth it. If you are like me, and you have a car that you fear one day might not start in the winter, or you like discounted movie tickets, or you like the maps, or the discounted Canada parks passes, and the vacation benefits (for example, 10% off everything you buy and eat at Universal, or the discounted tickets), then yeah, CAA may be for you....