We do the coastal cruises fairly often and have done that very one on the Dawn. They are great fun for a weekend getaway. In fact this year we are taking a one nighter on the
Zaandam and returning to Vancouver on the Saphire, also a one nighter.
Shop around because one of the cruise brokers has that Dawn cruise available for $111.10 per person with a grand total fare of $272.72 for two people in a balcony cabin including all taxes, fees, etc. You can't beat the price.