This is way cool, Chris!!! Have a blast! Getting to hang out with NBA players is really cool, especially since you'll be hanging out with the Warriors! If you need some Warriors gear, just hit me up. I got a couple of cool hats you could wear, haha.
As far as what I would advise you to do, just soak up the moment. You're going as a fan so don't worry too much about fan boying out or anything. Think of some interesting questions that you would like to ask them and in general, have fun getting to know them as people and see the human side of them.
I'm not sure if everyone on here knows this, but I cover Cal men's and women's basketball for Rivals.com, which has given me the chance to know guys like Jaylen Brown (Boston Celtics), Ivan Rabb (Memphis Grizzlies), and Jabari Bird (Boston Celtics) back when they were playing for Cal. I also get to interview recruits, so there's a bunch of future NBA players that I've gotten to know as well such as Troy Brown, Jr. (Oregon), Charlie Moore (Kansas), and Jemarl Baker, Jr. (Kentucky).
Without question, my favorite part of being a sports journalist is getting to know these athletes as people and see the human side. Basketball might be their profession, but they have other interests as well. So, more than anything Chris, I would advise you to use this as a chance to see the human side of these guys and just soak up the moment. This will be an experience that you'll carry with you for the rest of your life. I look forward to reading about your experiences in this thread!