No brainer here, but be careful walking along the Riverwalk since there are no railings except where the restaurants are. Our tour guide mentioned the at least 500 people a year fall in and that it was mostly men....LMAO at that one...maybe because of an angry spouse or girlfriend?...HA! Who knows! The river for the most part is only 3 feets, but can be slippery trying to stand up! Just something to keep in mind, especially if your thinking of having a drinkpoo or two:-P
There were several muggings at the Riverwalk late at night. If you are down there after dark, do your best to stay in the more populated areas. I would recommend hanging out in a group if you are down there REAL late. The Riverwalk is fantastic it's too bad that they have the crime to deal with.