A number of commercial marinas are available for mooring 242's and motherships, and the list can be found here: 

https://www.cowichanbay.com/marinas/ 

and here 

http://genoabaymarina.com/

Fisherman's Warf
Labour Day is a fairly quiet weekend at Cowichan Bay, and the Fisherman's Wharf Harbourmaster has offered to clear out a dock for competitors to moor their 242’s and motherships at and said that rafting would not be an issue (per the usual practice at the annual Cow Bay Regatta in early August in prior years). Fisherman's Wharf is a "first-come, first-served" facility with no advance bookings. The per-foot-per-day rate is CDN$1.05 including GST. 30amp power, if required, is CDN$6.30 per day including GST.

Competitors are advised that not all motherships can be moored at Fisherman's Wharf, partly due to Race Committee vessel requirements, and as such the alternate Cowichan Bay area marinas and anchoring need to be considered. Rafting of motherships may be required also at Fisherman's Wharf, and shared power.

Bluenose Marina
Jim Howard of the Bluenose Marina has said that they closed their transient moorage dock at the beginning of the pandemic, and all space is fully booked. However, he said on July 17 that competitors can call the Marina a couple of days before the Regatta to see if any slips have opened up for the long weekend.

Cherry Point Marina
Diane at the Cherry Point Marina (250-510-1963) is full with permanently moored boats, but said that competitors can also call a few days before the Regatta and see if any slips have opened up temporarily for the long weekend.

OceanFront Suites
Cori at OceanFront Suites (1-800-663-7898 https://oceanfrontcowichanbay.com/about/) says that there is complimentary limited moorage available at their dock for guests of the hotel, but boats that draw more than 3 ½ feet cannot moor there, as it is too shallow at low tide. Contact Guest Services to reserve your dock space.

Masthead Restaurant
Nuala at the Masthead Restaurant (250-748-3714) says that the Masthead Marina is full, unfortunately.

Pier 66 & 67 Marina
Dave & Ruth, Managers of Pier 66 & 67 Marina (250-748-6789) have space available on the Labor Day weekend, and competitors should contact them as soon as possible to reserve spots. They are very keen to see the Canadian Championships taking place in the Bay.
They have an 80' slip that can take motherships on both sides (with rafting possible on one side), assuming one existing boat can be moved temporarily, and more slips may become available. The rate is CDN$1.50 per foot per day including power.