Secret Gay Wedding

My fiancé and I have been together for almost 5 years (I'm 29, he is 26). We decided to get married (well, he proposed and I said yes) and we are ready. We'll move together and marry soon (probably this july) and we are super excited. We won't do a wedding event, we will (for different reasons) just go to the office and marry, only him and me, then go on a road trip as a honeymoon and just finally be definitely together on our apartment as we have always want. My parents, however, don't know it for certain (I'm not officially out the closet, but come on, they know I am gay). I am almost 30 years old and yes I haven't talk to them directly... I know what will happen, they will make a big show and go depressed and suicidal for a couple of days and then come and accept me like they did not destroyed my nerves and worried me and nothing happened... look, you may be thinking I'm just coward and to a point... yes, we all are sometimes. But the thing is... I already had to deal with my drama queen parents depression and practically rebuild my family when my sister came out... I don't want the same show and stress again, at least not now... It bores me. It's not time to rain on my parade guys... I just... find really annoying to ”confess” something that is not a crime, as if it was (especially when they know it! they are not blind or stupid). I know it will happen, because it has to, but only not now. So... I will be living with them again (cause since 18 years old I live away) like for a week before moving with my fiancé (who they think is my friend)... and I have been starting to wonder... will I really marry in secret and tell them later or should I talk now? BTW my parents married in secret back when they were 25 and 23 cause their families were not happy about their relationships (rich girl, poor guy) I wanna just marry WITH NO DRAMA, I will tell them and be a part of their show again, but I don't wanna do it now, let me smile on my wedding... uff, this secret wedding issue comes on the family, doesn't it? haha. What do you guys think? BTW my fiancé does not care... he is not out of the closet to all of his family either (but yes to his parents, btw they love me and they know we will marry and support us) and we respect each other lives.