For Episode IX panel you would probably have to camp out. I camped out for the VII panel in Anaheim and it was well worth it. Didn't feel motivated to do so last year.
For the other panels, probably pretty early for the big ones, but I managed to get a bracelet for some main stage panels (but not the big ones) arriving at a decent time last year, either when it opened for the day or maybe just before): Billy Dee Williams, music of Rogue One, Rebels (not the main room, but in one of the siderooms where we did get to watch everything, including the first two episodes), and Battlefront 2 (yeah I really regret that one in hindsight)