To install, visit the Stonehearth github GitHub - stonehearth/debugtools: Stonehearth Debug Tools Mod, select Download Zip, and save the compressed folder somewhere on your computer. Inside the zip you should find a folder named debugtools-master. Copy that folder to your mods folder, (located by default at C:\Program Files (x86)\Steam\steamapps\common\Stonehearth\mods), and rename the folder to debugtools. Let me know if this makes sense. You will know if it is installed if you see the following icons in the top right: 
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Edit: Debug tools is included with Stonehearth as of Alpha 19. Simply enable it via the mod manager.
The campaign browser is the left-most icon that looks like a book.
Edit: Here is a screenshot of the campaign browser:
I clicked on
wait to start on the goblin war branch, and if I clicked Trigger Now a new goblin encampment (the big one) would appear. You can play around in the browser to find what you need. I believe the new graveyard in in the ambient threats branch.