Yoga gear is light and quick to pack, but a mat rolled up while even slightly damp with sweat is a fast route to a moldy smell you cannot get back out. Give everything a quick wipe and a few minutes of air time before it goes in a box.
Pro tip: Roll mats in the direction of their natural factory curl rather than fighting it; a mat rolled the wrong way for weeks develops a stubborn reverse curl that is annoying to unroll flat again.
Watch out: Never seal a sweaty or unwashed mat in a tight bag for a multi-day move; trapped moisture causes odor and, in humid conditions, mold within a day or two.