Use your best most energetic leaders in the session right after lunch. Free, open to the public, donations collected, no experience needed, etc. Begin carrying the flyer to other conventions or mailing piles of them to major conventions so that someone else can put them out. Check publicity time schedule. Make sure press release schedule makes sense.
Some publications have three to four month lead time.
Make sure these are sent out. If you are using a non-profit bulk mailing permit, you need to allow at least six weeks for delivery. In addition, people need to receive the flyer at least two to four weeks prior in order to make plans. Flyers mailed to Canadian addresses must be put into envelopes and will require additional postage. Begin talking about food and what to fix.