Including a simple communion service as part of your wedding ceremony is not only acceptable, but an ideal way to include an important biblical element in the ceremony. Annually, I probably get about 8 to 10 requests for including communion as part of the ceremony.
During a wedding ceremony, communion fits best just after the rings are exchanged and is appropriate for either just the bride and groom, the bride and groom and their children, or if you have a small family and you want to include them, too.
If you want to include communion in your ceremony, just ask me or include it in the message of your booking form. I will simple bring with the same elements that I use at West Mobile Bible Fellowship. They are self-contained and easy to handle at any location you may be having your wedding.