Showers. Extra charge or not?

Just after an opinion so no right or wrong answer. 

We've just returned from a week away at a beautiful CL where their two showers were charged at 50p for 'aprox 5  mins' 

Would you prefer an extra £1 per night on the pitch fee to cover a couple of showers a day, or would you prefer the 50p per shower?

We both used our caravan's shower ....... ;-)