Nevermind, I think I discovered that they are available to recruit from Brightsgate automatically. Couldn't figure out how to delete this post. Thanks!

[strike]Can someone please help me figure out how to set up a caravan? I am playing the 2nd map on the Haven campaign, I have the city of Brightsgate and one Haven Core Dwelling that produces sentinels, crossbowmen and wolves. I cannot figure out how to set up a caravan to have them send their creatures to Brightsgate.[/strike]