Chalk? Hm. Jo hadn't heard of using that one, though she supposed that using salt might seem strange to anyone not acquainted with the life of a hunter, so she wasn't going to knock the chalk.
She took a deep breath, preparing herself for whatever waited for them within as they joined the relatively short line.
She held up her bag of salt.
"This should keep out a lot of things, so between the chalk and the salt, I'd say we're covered," she said with a smile that was a lot more confident than she was feeling now.