We'll be in San Diego for a week early March. Are considering either a sightseeing, Whale watching, or dinner cruise for one day. Any feedback on this time of the year and which might be best. We'd enjoy all three, just want to get out on the water. Also, any feedback on waiting to book until we know the weather a little better as to the day. We've never used this company before so not sure of this time of the year and how full they normally are. (There will be three couples going). Thanks in advance.