Add a cap-full or 2, of dish washing soap to your mix. It gives the solution a longer hang time. Just cup your hands full of water to rinse the faucet before hooking up your water line.One suggestion on the smoke detector.... Invite the cigar smoking friend OUTSIDE the motor home and remove the detector to the outside for the test... That way the rig don't smell of cigar for the next way too long.
For water spiogts and a few other things as well. Get a small pump spray bottle (Most drug stores have them, as do dollar stores) and fill with bleach water, Just a "Cap full" for the small bottle is more than enough. Spritz the spigiot at the park before you start to get your hoses out. it will be nice and sanatary when you hook up.... No matter what the dog ... Or it's master... Did before you arrived.
Also useful when you need to clean up an unsanatary mess.. Germs consider Bleach to be... Well, let's just bugs like Raid Better.