check their itinerary and then go the reverse route.

Frat party is a great description. They often come into the mooring field later in the day when it is too late for you to switch harbors. We had a most unpleasent night at Trellis one year, and after that we were careful to avoid the flotilla. There are lots of harbors and islands available to you, so unless you want to be part of the party, choose your itinerary carefully.