If you want to park with someone, will they let you pull over and wait a minute or two once you’re in the lot? If not, any thoughts on where you can pull over and wait outside the lot?
They would probably be okay with it as long as, at the point at which you show up, they aren't already parking cars pretty far back in the lot.
What we do is meet at a nearby location, then we caravan to the lot so that we're all arriving at the same time. We might wind up with a few cars intermingled with us when we enter, but the folks working never have a problem with that.
They might have a problem if someone arrives and waits around for 10 minutes if the lot is filling up quickly. But why take the chance, just meet close-by and caravan in. Easy.