I'm back! This is the Swamp Bivouac (25x30), a little campfire in the swamp that'll be perfect for battling bugs and swamp critters of all sizes. Personally I'm a fan of oozes, so I'd hide all kinds of them in the water for your players to accidentally stumble upon, maybe even sneaking up on them while they camp. Yucky and effective! Otherwise, I think you can never go wrong with roving swarms of bugs to fill in combats in the swamp, perhaps indiscriminately attacking warm-blooded enemies as well as player characters.. unless they brought bug repellent.