Rent cylinders locally unless the team has confirmed airline, valve-removal, cleaning, and dangerous-goods requirements. Reserve oxygen, helium, nitrox, sorb, boosters, bailout cylinders, stage bottles, and CCR-specific support well ahead, because not every center stocks every gas or fitting. Carry personal regulators, lights, computers, harness, reels, exposure protection, seals, and mission-critical spares. Ask whether the accommodation has a secure equipment room, drying space, rinse access, charging, and cylinder storage. Keep wet or muddy cave equipment out of ordinary guest rooms and vehicles where the host or rental agreement prohibits it.