No reason to send pizza, but when scheduling an appointment, it's also best to figure out a pickup date with the advisor at the time. Lots of boaters use their boats very little, and don't care when the boat is ready. So service gets used to that mentality.
Repairs may be a little difficult to time since ordering parts is in play, but there's no reason for them to not be able to provide a pick-up date. Let them know that time is of the essence too.