I just took the three I have for the UK. I have 1/2", 3/4" and 1" and they fitted all the screw taps I came across in France and Spain. I got them from here.
Occasionally you will come across taps without a scew thresd. In Aires that usually means it is the tap you clean the toilet with, so you should not use it for fresh water. Usually you will find a threaded one nearby. However there are plain fresh water taps on some camsites, in which case you have two choices. Use a universal type fitting, which often will need holding onto, or use a watering can and just make a few journeys.
Came across a campsite in Nantes where the hose connection was a 'female' which required a 'male/male' connector or a tap with a 'male' connector -I'd seen this before and had not been able to find a tap ,but this time reception had them for sale :thumb:
so that's another addition to my water connectors box.
As you tavel you will build up a collection it is also advisable to have a couple of hoses of different lengths and fittings to join them together if needed. It saves using 30mtrs of hose if you are only 5 or 10 mtrs from tap