Went as far as Sidi Ifni in June last year in a Toyota Hiace camper... excellent trip. Make sure you stop off at Essouira on the way and also there is a wave spot just beyond called Sidi Kouaki which is a bit less touristy.
If you do go to Essouira go to a camp site called Camping Le Calme. It is a bit inland but like an oasis of civilisation in the midst of Moroccan chaos.... toilets, showers, swimming pool and even a restaurant which serves non-toxic food.