So at the end of RRR I've decided to mesh in large parts of Second Darkness into the campaign. The only real rule is to keep all the locations within the Kingmaker setting. Luckily, I had just enough time to squeeze in some of book 1... This is a work in progress.
Important Locations:
Nomen Heights Lake Silverstep area S, add the island the Devil's Elbow from SD Book 2.
Nomen Heights 11 Down 3 Over, add the elven cities of Crying Leaf and Celwynvian*.
*I know its kind of hard to rip the city from where it is, but it works and to have a lone lost city at war. I'm sure this could cause some problems with them and Kyonin if they tried to take it. I definitely want to add some more "stuff" to the nomen heights map so it might be beneficial to add something in the surrounding hexes. It needs to be far from Restov, but I don't think it hurts the story.
II. Rivers Run Red
A. The dark cloud from Shadow in the Sky settles of the capital city.
B. Using the entire Devil's Island story, except the part with pc's competing with bandits in their port.
C. This could provoke some interaction with Maegar Varn so its good to get them involved in the story.
III. Varnhold Vanishing
A. Using the city of Crying Leaf and Celwynvian almost entirely. My players have alot of elves in the party so its pretty easy.
I'm already running a plot where the Winter Council is interfering with the Grand Diplomat, she's an elf and she's trying to get more elven culture into their society. Of course the Winter Council wouldn't like that.
Not quite sure where this is going yet, I'm probably going to leave out the underdark section... Ideas?