WordCamp Lancaster is a conference that focuses on everything WordPress.
There are hundreds of WordCamps every year around the world, and each is organized by local WordPress folks. WordCamp Lancaster is organized by this team!
WordCamps are informal, community-organized events that are put together by WordPress users like you. Everyone from casual users to core developers participate, share ideas, and get to know each other.
WordCamps come in all different flavors, based on the local communities that produce them, but in general, WordCamps include sessions on how to use WordPress more effectively, beginning plugin and theme development, advanced techniques, security, etc. To get an idea of the types of sessions typically seen at WordCamps, check out the WordCamp channel at WordPress.tv.