Guys, park at Angels Stadium (free on non game day, and Angels is not playing this weekend). Take the Line 50 bus (comes every 30 minutes), it's a 11 min ride. Or just Uber from there. The bus takes you directly behind the Anaheim convention center.
I've been to several large conventions there for work, and this is the way.
Anyways, it'll be super hot tomorrow, so I can see how waiting for the bus outside may be a problem. Need to bring styrofoam boxes for the corals or something to keep cool.