Starting at 9:30AM on June 10, Nintendo is distributing 3000 wristbands from the Nokia Plaza at 777 Chick Hearn Court on a first-come first-served basis. That said, Nintendo requests no queues before Tuesday morning so there's no need to pack those sleeping bags. Then it's a wait until the afternoon with doors opening at 2:30PM and the tournament kicking off at 4PM.
As for E3 itself, 2014's conference marks the second year Nintendo goes with a streamed Direct broadcast in lieu of the traditional live presentation. Super Smash Bros. is one of the games Nintendo is expected to showcase, with the franchise-spanning fighter due to hit 3DS this summer and Wii U in the winter.