100% do it. We LOVE the Grenadines. Even on a powercat I highly recommend doing the one way St. Lucia to Grenada. There is so much to see and never enough time. Grenada is absolutely a must see. It is a beautiful, unique island full of culture. I'm a bit partial as I grew up there. I would be happy to give itinerary recommendations if you would like but some must sees are: The Pitons, Bequia, Tobago Cays, Petite St. Vincent and Salt Whistle Bay, Mayreau. The Grenadines are a bit like the BVI used to be back in the day and are still quaint. There are still plenty of beach bars (we can also give lots of recommendations on those as well). I also travel with early 20 year olds who like a little excitement (as in bar scene) so love the BVI's, however, they can't wait to get back to the Grenadines again. If you decide to go, get Chris Doyle's Cruising Guide. He is a family friend and very knowledgeable of the area.