I was in Morocco with my boyfriend in January. I found the people to be very hospitable and respectful and had no problems when I was out and about by myself. Clothes wise, you need to be respectful of the culture and cover up. I met another woman who had been travelling by herself who agreed that the South was pretty laid back but she had had some problems in the North. I learnt some Moroccan Arabic phrases before I went and these went down really well when approaching people for informaion, directions, etc.