I've been during food & wine and NO free dining. You needed an ADR for sure. We were in club level, and the concierge really struggled to find us anything in Epcot that day. I think we ended up at Nine Dragons, but that was all that was available. Learnt a valuable lesson that day!! It was busy everywhere. Considering it is free dining, you probably want to make a few plans now.
There are some good CS available though also. I really like the place in Japan, nicely authentic, or you can pick up some fish and chips in UK, if you are looking for something a bit more substantial than just the booth offerings (which are usually very good too!) As it is F&W you have the advantage that if everything is booked up, you can still graze around the world.
Have fun!