The rally itself is over the entire weekend but we are planning a day trip across, weather and ferries permitting.
I have advertised it on the Kent SOC list server and also on the BMFinKent forum and so far have 5 peeps and 4 bikes who want to go.
Checking the ferry websites shows that P&O are £19 all-in for bike and two and that includes a £4 fuel surcharge. For their part Seafrance have a £15 fare plus an optional £2 "marine conservation" donation.
Eurotunnel though have nothing book and it it was it would be £29. Considering they are still farting about since the fire and their general don't-give-a-shit attitude to bikes it looks as though the ferries are the way to go.