I was there last year. It really is only 1 autograph booth and they change who is sitting there depending on the time of day. Each person is up there for I think about 2 hours. There are usually about 5 people sitting up there at one time. And the schedule is usually posted on BC/EFA website a week or so before the flea market.
Hope that helps
"Judy Garland, Jimmy Dean, You tragedy Queen" ~ Taboo
"Watching a frat boy realize just what he put his d!ck in...ex's getting std's...schadenfruede" ~ Ave Q
"when dangers near, exploit their fear" ~ Reefer Madness the Musical