Before the presentation even begins I would say to get it out of the way and let everyone know "I Stutter". Being upfront about the entire thing that's causing the fear and anxiety for us is going to alleviate the intensity of the situation. Just focus on your presentation and how good you're present it, don't fixate on your speech or how other people are going to react. One thing I've had to learn and accept is that people are going to laugh and be uncomfortable by it, it's okay! The most horrible feeling ever is to already be uncomfortable and anxious and then focus on how you're going to stutter and how they're going to react and then how embarrassing it all is going to be. Just focus on doing your best. If you stutter it'll be fine that doesn't mean you failed or they're not going to understand what you're saying or trying to say. The thing we all have to start doing more is being open and saying "I stutter" freely, You'll do great and I'm sure of it! Don't care about reactions, stuttering or laughing, just keep it slow, smooth and do your best! Good luck to you!