Cool concept. Keep the entrance discreet, use natural barriers like thick vines or a low wall that looks like part of the garden. Install a lockable gate that blends in—maybe a wooden door painted like a tree trunk. For extra security, set up motion‑sensor lights that only turn on when you’re near, and a silent alarm that triggers a loud chime inside the garden. Make sure all pathways are clear but still natural, so it feels like a retreat, not a fortress. Stick to that, and you’ll have a safe spot that still feels like a hidden oasis.