Evan offers PLENTY of truth & a perspective unique to his own experiences. His last sentence holds truth especially if you are "greener," to the business side of films. Despite having no direct contacts, I received an two offers for my microbudget film and valuable knowledge about the business side of things.
AFM can service you, if you have good --OR-- marketable movie; and thick skin. I attended with a near-completed movie, a POLISHED trailer and a very simple game plan -KNOCKING door-to-door. I quickly identified who was buying and selling. Hearing others, I developed a 30 second pitch. Did I get rejected most of the times? Yes, I struck out about 90-95%. If have ever dated in the LA scene, it sucks but you get it. Rejection is part of the process. The remaining 10% would lead to 5 minute meeting (I was being squeezed between meetings). If I was lucky that would lead into 20 minute meetings. From there, I found distributors/sales agents super helpful and brutally honest. Every time I left a meeting, I became so much better for it.
The key to AFM is going with a two-person team & making sure one of you has the guts to sell your movie. Going with someone helps split the bill, offer morale support when you flounder the pitch and offers another avenue to connect. One of my buddies, met someone in the hall as he was waiting for me in the bathroom. Also if you DO decide to go to AFM, try to set up meetings months in advance. I learned this the hard way. I HAD to go door-to-door because I didn't do this. I would also say, don't go balls out for the everything package. I think you need ONE day to hit every level. It will be a challenging day but you can do it! Good Luck