How to bring it up??

So im 17 and my boyfriend is 18, we been dating 2 years and my dad does not like him at all but my mom invited him to go with us on vacation to new york (were in florida) and idk how to tell my dad. I waited last minute i leave tomorrow at 4 am... So i have only tonight to say somthing and if i dont say anything at all ill be in even more trouble when i get back home. My dad is strict  when it comes to my boyfriend and i feel like he will just yell at me when i tell him my boyfriend will be going with me and my mom. Im not really sure what to say and how to approach it without him freaking out and yelling at me.