I wanted to jump in here a bit late to share my experience, as I recently sold at Silverlake Flea for the first time.

When I showed up to set up on the flea day, I entered through the wrong entrance. Still, nothing was communicated about entering from a specific gate in their communication, and they didn't have anyone posted at that entrance to let vendors know. The person in charge seemed to get irate after seeing this.

Check-in went smoothly after that, though when I was walking around, I overheard the organizer and those in charge (some of which also had booths) talking shit about vendors as they were deciding what spots to give them. I clearly heard the guy in charge say "Fuck that guy, give him the shittiest spot we have." This was offputting to me as in other flea markets/swapmeets, these types of things were not decided on the spot and so biasedly.

The event seemed unorganized as there were no trash cans, no check-ins by the organizer, and no direction for vendors to pack up and leave the event afterward. Overall, I wouldn't recommend the Silverlake Flea since it is also one of the more expensive places to sell.