Rephrasing to help confuse you all:
We've never been before, we're a touch nervous.
We're thinking of 'making a night of it'. That is, quite literally, dinner and movie first. If we do dinner and movie first, we likely wouldn't arrive until midnight. Is that going to be too late? Will we have missed most of the action by then? Or will the party just be getting into 'full swing'?
Thanks