There's nothing worse than having to plan and attend a wedding with family where there are heavy issues that need to be resolved. Take a stand and mend any strained relationships before the big day. You want your daughter to enjoy her wedding day as much as possible, and a big part of that includes avoiding family drama.
Lingering family tensions that can't be fixed with a visit, phone call or letter should be neutralized. For instance, if certain relatives don't get along, place them at different tables at the reception and rehearsal dinner. If you and your husband are divorced, agree to a peace period between your daughter's engagement and her wedding. Cooperating to plan a beautiful day for your daughter should be something you can both agree on!