I second the not bothering with creatine, you wont retain the weight. Its generally water weight, while you may get strong when you cycle off of it you'll drop some weight. Just do as TheNegation said, eat clean and lots of it, heavy compound exercises. Look up Bill Stars 5x5, or a modified 5x5, something of that sort will be good for gaining mass.
I heartily accept the motto, "That government is best which governs least"; and I should like to see it acted up to more rapidly and systematically.