I'm not from the US, but I did go over to Austin (where the boy is from) without him in October, I think.
I went for GDC Online which is a big games industry conference, I go to at least one GDC every year, mostly Europe and SF, but I hope to get to GDC China this year (ha! Will never happen!).
It was okay, there was a big DELL conference on at the same time and the city was really busy. I stayed in the weirdest hotel and had a strange massive suite to myself. Was bizarre, it had a free happy hour that lasted 5 hours though...which was dangerous x 100. I didn't see much (I did have dinner with my MiL, who kept me for HOURS, she's really nice but she invited the entire family over and tbh i don't think my DH's step mother cares that much about me to be stuck with me for quite a long evening) although I spent a happy day wandering around SoCo and hit a couple of my favourite places before then, and I got a decent-ish haircut.
We were invited to several parties, one was really cool and on this rooftop, amazing free canapes and booze, anything you wanted, which was fun as I tried some amaze tequilas. I met a couple of my heroes which was fun.
I ate a lot of BBQ as the people I was with hadn't been to TX before.
I didn't buy much, aside from some dresses, and a T-Shirt which had lots of boy scout knots on it from Stagg menswear in SoCo for the boy which was like $50, is it me or are clothes in the US really expensive now? I swear they used to be cheaper! But My dresses were like $90 each which is about what i pay on average for a dress here (£50).
I brought back crystal light and peanut butter M&Ms, and some reeses cups for the guys at work. I also brought back a lot of business cards and some swag, t-shirts and mugs and flash drives etc.