are the waves pretty consistent in march/april? its going to be a planned trip like in a month in advance, so what are the chances will see something over thigh high?. also hows the the water temp there? i know its still in 40's/low 50's in jersey in march and april
camping in March might be a little cold with no place to get warm and dry after a session...i'd try Avon Cottages, I've planned some school trips as well and we stayed there. Not the nicest place, but good if you're going with a bunch of people.