Based on my own research, guys, I think it's very likely I'll be able to play Smash at E3, despite not getting a ticket.
Mostly because Nintendo had the MERCY to make a standby line. I am standing outside the convention center a good 5 hours before they open on Tuesday and I am BEE LINING it to that line. Chances are likely, with so many people in attendance, that a spot will open up. By the time us folks with the gamerpass get in, the press will have already had a good 5 hours of their fill as well.
And if by some miracle it doesn't happen, I still have the last day! Not only is it the longest day for those of us with the gamerpass pass, but every hour shuttles will be going to take people back to the airport. I'll be there the entire time since my flight isn't until the following day, and with less people in general, and more people possibly having to miss their session thanks to their flight, if I don't get lucky day 1, THAT will be almost guaranteed.
I'll have to waste quite a bit of time, but it's not like I'll spend the entire time there, and wendsday is entirely open to me for all the other tasty, tasty games. I have faith I'mma Smash!