Well, the city of Berkeley is not very friendly to the Sea Scouts (or scouting in general). You might try calling Marina Bay in Richmond and asking for a donated slip. They have plenty of empty berths so they might be looking of a "tax deduction"
Otherwise; you could try mooring it on Richardson Bay; but I don't know what the legalities are on it. You definitely would not want to have her sink or get washed ashore and be liable for wreck removal. Another possibility would be asking to haul/store it at the Martinez Sea Scout base; until you could find a location for donated berthing.