Wheels at CDA?

I’m going make my first attempt at Ironman CDA in a month or so and I was wondering if anyone had any advice about what wheels to use. I have access to a set of H3s and Zipp 909s (or a combination of the two). I’m not a very good climber so I was thinking that I would try to lighten the load and use the 909 front. I’m also concerned about wind. Will I be a danger to myself and others if I use the disc? Any thoughts would be appreciated.