Well done - if you have such a good holiday as we have had on both occassions I am sure you will not want to holiday in UK again. The only reason we went from Plymouth is because it meant less towing on the "wrong" side of the road. Driving there is easy and none of the road works/hold ups etc. as experienced here. You must visit Quimper and the cathedral and also Concarneau and the old fortress town. Brest was a disappointment. Take as much milk, bread, butter, bacon, etc. as you can as it is difficult to get food for a good British morning breakfast.
If you approach Benodet from Quimper direction, on the second roundabout there is a supermarket on your left (Champion). At this roundabout go straight across and down to the sea front. At mini roundabout on sea front turn left, next roundabout turn left again and then the site is approx 1/4 mile along the road on right.
Good luck and enjoy yourself.