I've packed my own showerhead and channel locks (large pliers) to change it out. Throw a washcloth between the pliers and the showerhead to prevent damage when removing/re-installed.

I also carry a CO detector with me since a lot of rooms don't have them... despite having large pool heaters, water heaters and other fuel burning appliances directly next to rooms. Laws vary be state. Usually, the laws are only present where a bunch of people have died already (or, people with money/fame). I try to not be part of the learning curve. I'm probably more sensitive/aware since I work in an industry where I learn about things that go wrong and just how little attention/care is given to keeping us safe.