Camping Caradon in Polperro, it is 3 miles from Looe which has a nice beach, it is also only a mile to Talland Bay which is a smaller beach, it is within walking distance, but it is quite a hike back up the hill. The site is very nice we have stayed there 3 times and only came back from there on Friday. The owners Steve and Lene are very helpful. The site is imaculate and the showers/toilets are very clean. There is a small clubhouse on site which also serves meals in the evenings. There is a small play area for the children.
They do have a website.
Hope this is of some help.