Prepping for First Gig

Hi all, I was hired by a friend to DJ his wedding reception. This will be my first gig! He told me I can go to the venue and almost any time to check it out and see what I need. He has also given me the contact for the venue manager.

What should I be looking out for and what kind of questions should i be asking?

I was told that the venue has speakers, but that is about it as far as hardware goes. I believe I have everything I could possibly need, (controller, laptop, audio interface, various cables) but could I be missing something?

I appreciate any advice, thanks!