Many people somehow fall under the impression that wedding invite wording always has to be formal. It really doesn't. You can keep the invite very simplistic and include you and your spouse's name and a request to the particular recipient to make him or herself present and your wedding.
Naming parents in your invite can be quite a complicated process. It's common for a typical invite to first mention the bride's parents, followed by the actual invite, than the name of the groom and his family. While this is not very complex in itself, problems can get quite apparent when divorced or step-parents come into the picture. You want to limit the number of people you name in the invite as you may end up confusing guests. You also want to remember to take your parent's feelings into consideration. Omitting people without first consulting them can result in problems. Thus, be very careful before you strike someone from the wedding invite.
When it comes down to it, you and your soon to be spouse have a lot of control over how your wedding invite is both worded and organized. You need to maintain a certain degree of flow in the invite, but aside from that you are essentially given a lot of flexibility.