We suggest carrying spare faucet cartridges for all of your faucets, including the shower, in case of leaks. During a "pre-flight" check prior to our last trip we found a constant drip after "power up". It was the Kitchen sink cartridge. Moen is a good source if you have the time for a 'next day' shipment. The Home Depot was better in our case. The cartridges are inexpensive, light weight and don't take up much storage room.
In dog years, I'm dead!