No, they didnt take me to any secondary room at all, the CBP officer just wanted to see my K1 visa packet, my passport and asked me when I would get married🥰 I think it was 10min total🛂
You dont have to put any info in the I94 form, its done during the CBP control, you just need to check later if the info on it is correct, I checked mine the next day after I arrived in the US with the visa and everything was correct✅ Its important bcs you will need this document for the AOS‼️
I also went to a familiar airport so I felt more relaxed, good thing you are going to do the same too☺️
I had a connecting flight in LA airport, I had 4 hours layover and it was more than enough, I even got bored LOL😆 so you will be fine too, dont worry♥️