Shell Boats Schooner 18

[stickers11]

Hi all,
First time poster. I'm onto about my 6th issue of Wooden Boat magazine and now just purchased their issue of Small Boats. I am very intrigued by the Shell Boats Schooner 18, available built or as a kit.
http://www.shellboats.com/sbboats.ht...or_Schooner_18

Things that impressed me: the size, the features, the weight, and the price. I am looking at getting my first boat in the next few years. I think a daysailer is the best way to go for now, so I am looking at something I could tow behind a medium sized car.
My question would be for anyone who has read the article; would this boat be suitable for anything other than a lake? I'd be looking to use it in some of the more protected waters in the Vancouver, BC area. Don't worry, no circumnavigation of Vancouver Island. Would this boat have enough depth for more open waters?
Secondly, does a bilge keel offer enough lateral resistance to properly sail? I know a center board would probably be preferred, but what can you get away with with a bilge keel?
Thanks for any suggestions or tips. Would also gladly take suggestions of similar rigs that could be towed and that have a small cuddy cabin. Looking to keep weight of boat and trailer under 1500 lbs.