How can I make it smell better?

Okay well if you are looking forward to him going down on you, then I would assume that you really want to make it a pleasing and wonderful event for both of you.

I would suggest that in the week or two leading up to your first night together, that you shower twice a day and focus on rinsing the exterior of your vagina and cleaning it really well with a non abrasive nor chemical-based soap.
If you would like, get a wax job as it makes vaginal maintenance a lot easier and also increases sensation. Getting a brazilian wax, especially if your bush is wild and unkempt will drastically reduce the noxious fumes from down there by getting rid of places for smelly bacteria to live.

From an oral loving guy (both giving and receiving), I would only suggest you return the favor to your new husband when the event happens. I guarantee that if he performs oral on you (and you like it) and then you return the favor, he will give a repeat performance at the next opportunity, to which you should again, respond in kind. It makes a great love-making session into a religious experience. Good Wishes on your engagement and good luck in your future.

PS - If he REALLY loves doing oral, he will not care if you have a 100% natural (basically - healthy) smell. No other products are needed.

You are just nervous and that's totally understandable a day spa can do a wax for you and its not as embarrassing as you might think and if he's into oral get the Brazilian wax its where they get your bikini line plus the part of your lips that he would be kissing sounds horrid but it makes it look quite nice and feels amazing during oral sex to you both (I will warn you the most painful pat of the wax is the top of your pubis bone it feel like the roots are longer than anywhere else put soon as they rip off the wax she will apply pressure simply by placing her hand on the area and amazingly its what kills the pain and on the possible odor use antibacterial soap then a smell good kind and try a massengil douche the day of the wedding I think you will be just fine GOOD LUCK

Every woman is self-conscious about her area at some point in our lives. We all have our own scent and it's not a bad or unhealthy thing, it's just nature. One thing that I'll suggest though is Summer's Eve feminine wash for sensitive skin. They have a green tea scented one that is my personal favorite. Or you can go to an adult store and purchase some warming scented/flavored body oil and put a little of that on there before the big event. I'm sure you'll be fine though. Congratulations on your engagement and good luck!