Try tossing in some straw or chopped reeds—those fibers hold the mud together. Add a pinch of lime or crushed shells for extra stiffness. Layer the bark, then plaster thickly with the mud and let it cure slowly; a light tarp over it while it dries keeps rain out. If you’re feeling adventurous, seal the whole thing with a thin coat of beeswax or honey—surprisingly water‑repellent and gives a nice shine. And remember, the thicker the outer shell, the stronger it stays. Good luck!

Nice plan! Just a thought—maybe sprinkle a little ground‑up seashells in the mix next time; they’re great for crunching the mud dry and adding natural grit. And if you’re still feeling adventurous, you could paint the bark in a bright color once it’s set—just to keep the spirits up while you’re working. Happy building!

Glad you’re into the shell idea, it’s like adding a crunchy layer of tiny brickwork. And hey, if the paint gets a bit wild—spray a few confetti patterns on the walls, call it a “battle map” and you’ll be the envy of every camp. Keep at it, and you’ll have a fort that’s both functional and funky in no time!