I got invited to an after-wedding day party and my response was, that I will come if there isn't an SDCC Badge sale that day. It has begun lol
Also, there is a day before the wedding welcome party, the wedding, and an after-the-wedding party. It's a lot of parties
I actually had a friend, who lives in San Diego mind you, who got married Saturday of Comic-Con! He was somehow shocked that family and friends flying in had trouble finding a hotel downtown (he had it in Coronado somewhere, IIRC), and seemed a little bummed that I skipped it.
For me & Pre-Registration, it's always perilous since it's during marching band season where I have rehearsals every Saturday from 8am-3pm so when announcements for Returning Registration happen I have to plan rehearsals so I'm in one of my band rooms near a computer that morning

(YES, it's more laid back for me nowadays since I'm a Pro but I go all-in trying to help my lineup group & other friends)