Looks like an interesting event.
"BRING YOU OWN BOAT AND PARTICIPATE IN THE RAID.
Join the flotilla or take part in one of the watersports festivals near you. The raid is open for all to take part. You can participate in the competitions and festivities at the destination ports, and/or follow the route by sea.
REGISTRATION IS FREE
and registered participants will benefit from the organised in port festivities and competitions and beneficial berthing and entertainment tariffs."
"Motor boats (less than 9m)
Motor boats and RIBS of less than 9m LOA can participate in the competitions held at each of the ports of call and towed over land from one port of call to the next."