Hello, everyone! I come to you, hat in hand, with a question (whether it is insanley stupid or not, I do not know):

I want to make an Island that is only reachable by boat (i.e. you have to talk to a ship captain, and then you are loaded into the Island's Cell); I assume this would require a custom worldspace of some sort, but I am unsure of how to go about it. I tried the wiki, but I didn't really understand it.

So, here it is, in what (I hope) is a concise, easily-understood format:

1. I want to make an Island that cannot be reached by normal means (swimming, running, riding, TCL, etc), but instead requires talking to an NPC.

2. I have tried reading about Worldspaces on the wiki, but don't quite get it.

3. I assume some scripting will be involved - help on that is also appreciated.

Thank you! If I wasn't clear on something, please let me know, and I'll try to explain better!

No scripting involved at all. Expand the World on the main toolbar and select world spaces. You'll get all the world spaces there (such as cities, Skyrim etc). Simply right click on the list and select new and start from there.

Easy stuff (mostly!)

Creating a worldspace is as simple as going to World > World Spaces in the CK, from there right click in the list on the left of the WorldSpace screen and click new. Give your worldspace its editor ID (the name it will have in the editor, NOT the same as the actual name of the world space. I generally like to name things based off of my mod name and the worldspace name. So lets say the mod is called Winter Island, I'd make the editor ID WIIslandWorld (Winter Island - Island - World) naming convention is entirely up to you though of course. From there your new world space will show up in the list of world spaces, on the right you can add all the information for your space, ie the Name (what it will show up for in game) and all other pertinent information about your worldspace.

http://www.creationkit.com/Worldspaces also if your island is going to be similar to an area already in game you can look at that area in game and try to copy some of the details.

After that your new worldspace will show up in the cell view window, just select the World Space dropdown in the upper right of the of that little page and select your new WIIslandWorld. Voila, an empty world that you can then begin to build as you see fit.

As for traveling (I'm basing this off of the cart drivers in game already as they do exactly what you want them to do) sadly I'm not too familiar with how it works in the new CK, but in the old you'd create your actor and in his dialogue options you'd have an option for travel, in there you'd simply have a script that would move the player to your new destination when the player chose that response.

edit: Ninja'd by Chaka ZG with a much more concise answer!

Just stay away from the World Heightmap Editing...
Its buggy.

Thanks, guys!