Videographers guilds, trade associations, organizations, etc.
 

So I've been doing some Googling about videographer, television, and film trade organizations. So far, the all seem to be pretty similar, but especially so with the price. Like most of you I'd rather let my reel speak for itself, but I'm pretty curious about all this. Photographers, especially, like to cling to their PPA and CPP memberships.

Are any DVinfo members in some of these groups, and could speak about their pros and cons, especially in regards to how worthwhile of an investment it is?