Instead, this article breaks down the underlying math and mechanics of a campaign run from 1st level through 20th, including all of the encounters, experience, and treasure. This article will help you with none of those problems. But with some effort (and a little bit of math), we can find a skeletal structure for campaign planning which greatly simplifies the process. Mapping the ebbs and flows of the story, plotting the course for antagonists, and laying plot hooks can all take a great deal of planning and forethought. Planning out a campaign is difficult for a variety of reasons. Example – Planning a Level Introduction.