I'm considering doors also
You will want to leave the slats in place and fit the doors to run on the outside of the slats. That way in a big blow for safety reasons you can still put the slats in. If the boat was even rolled the doors will surely seporate and allow water in the cabin thus jepordizing the boat. Dick Dixon has some great examples in the forums. He may be of some help. Pray for Wind, Lugeman