Cedar Bog - full of interesting plants, and mosquitoes! The biting insects are par for the course when exploring such places, unfortunately, but a bit of bug repellent can keep them at bay. Much more worrisome is another bug, the emerald ash borer. Much of this forests's composition is made up of ash, including many hefty pumpkin ash, Fraxinus profunda. As those big trees are killed off by the invasive borer, the ecology of this swamp will be dramatically altered.
Ferns have certainly been successful. They've been around since the dinosaur days, and long before. Fossilized ferns compose much of the coal that we use, and ferns remain abundant to this day, especially in tropical regions.