Arriving a couple of hours late isn't usually a problem, as the rest of your crew can take care of the yacht check in before you arrive (just be sure to give them your share of the yacht security deposit!).
Depending on the route the yachts may set sail as soon as they are ready, or stay in the marina the first night. If the yachts have departed by the time you arrive you will need to catch a ferry to meet them. The ferry connections are good, however you may need to wait until the following morning. Just communicate with your TYW skipper for assistance and if you have any other questions our customer service team can also support info@theyachtweek.com.