Not only should you drink lots of water while taking creatine, you should cycle on and off of it regularly. If you do not cycle it, it may screw your kidneys. Drinking lots of water will not save your kidneys alone. I used to take it in high school when I lifted every day, and I saw huge gains in size and strength. It can be tempting to keep taking it as long as you see the gains, but you HAVE to cycle. Keep a good log on any supplements you take, especially those that can be harmful to your liver or kidneys.
I have a strict guideline I follow... If I'm thinking about starting on a supplement, I research it first. It doesn't take much, just surf the internet and ask friends about their experience with it. This is the perfect place to get good reviews from those who have already tried them. Before taking creatine or any other supplement, first know what it is and how it works.