But in Wyrmstooth, your adversary is a Dragon With A Plan. A plan to actively enslave the human population of the island of Wyrmstooth. What starts off as a simple dragon hunting mission, ends up with a lot of dungeon delving, discovering the dragon's plan and trying to thwart it. Quite epic.
But once that's done, there's still the rest of the island to explore! There's the ever-present bandits (of course), but also some remote dungeons, an outpost of the Vigilants of Stendar, and you can even purchase your own castle! There's a lot to do on the island, and it has some neat dungeons. It even has some neat new spells -- you even get to possess a Draugr to solve a dungeon puzzle.
It's not as big as the DLCs, but it's not that much smaller. The island is big and rife with locations and adventures, just how I like 'em. This one comes recommended!