Would be down to have a beer and I live super close to downtown Austin, so could host a share for you too.
BBQ recs are mostly here:
https://www.talkbeer.com/community/threads/the-texas-bbq-thread-no-pork-allowed.33454/
Most of the things to do in Austin are outdoors, music, food, or booze related activities (or some combination of all). Fall is my favorite "season" in Texas because really we only have two seasons, hot and absurdly hot. Oh and I did mention FF to you of course and in your case, it'd still be worthwhile to wait in standby even if getting into a screening just comes down to pure luck.