I saw a couple posts about rehearsals so that's what made me think of this.
Our venue is rented for all day Saturday, 8AM-12AM, that's how they schedule the rentals. If we wanted time on either Sunday or Friday, it's like $100 an hour? Not a huge deal but if someone is having their wedding and wants to rent all day, they cancel the hours you asked for. I'm just going to assume now that if we were to rent out an hour or two the day of that it would end up cancelled. There's park on the beach next to our venue, would it be weird to do it there?