Just disclose by laying out the facts of the situation. I doubt something like that will hurt your application. You don't need copies of the charges though, don't worry about that. Just a short and to the point addendum.
Hi @jwrigh73, if it is on your record it would be wise to disclose it and explain what went wrong. This is so important especially if you plan to sit for the bar exam. Also, @"david.busis" would have a greater insight on this.
Just disclose everything. The only way you get screwed is if you don't disclose, and they end up finding out on their own. They will think you were trying to hide it from them. They don't care about drinking offenses when you were in college.