I'm getting officially engaged Sat night and should my fiance and I refrain from physical relations?

We are having a really short engagement, like six weeks!! We met in high school and he was my one and only and I was his first time too. Since then as bf and gf we have been steadily doing it. We are going to Las Vegas (or maybe Reno I like it better there) for a quickee wedding in a wedding chapel in December. Our parents are going plus his brother and my brother and a few of my gfs are going too. I want our time alone together to be sooo special and romantic like maybe if I were a "real virgin". He's at the state college today where we both attend and I'm joining him later for a study date plus he has a paper due on Monday. I need some input should I ask him that we make a pledge of chastity for the next six weeks until we marry? I think he will be really disapointed because he likes doing it with me lol lol. He's in the delayed entry program in the Army and will go away for Army Basic Training and advanced Infantry Training for like 5 or six months in January. I won't get to see him after January until Summer time sniff sniff.