Weddings aren't simple. There are rules and procedures at every turn. Families preparing for a wedding often receive a crash course in party planning and guest accommodations. Even rehearsal dinner etiquette can be rigorous. Understand the rules can make all the difference and lead to success and fun.
The groom's parents are considered to be the hosts for the rehearsal dinner. Leave the details to them. If the engaged insist on thanking the wedding party by hosting this themselves, they should make sure to explain it to the groom's folks. If the parents get very upset, keep them in the picture. Why take on more work when letting others manage it makes them happier?
Plan the dinner for the night prior to the wedding day. This ensures that all the guests and family are in town, available to attend. Don't hold it a long time before the wedding. That puts more pressure on people. Avoid hurting people's feelings or making their attendance more difficult . Happy guests make for a better wedding.
Make sure to invite the immediate relatives on both sides of the wedding. Include close friends as well as the entire bridal party. The preacher or whoever officiates the wedding, offers the vows, should also be invited. Don't be too hasty when it comes to planning the invites. Maybe uncle Albert is a little rude, but is it worth a lifetime of bad blood to exclude him?
Give people a little time to relax before eating. Make it a relaxing situation. Make sure the dinner isn't out of whack with the cost of the remainder of the wedding. Spend more when the overall wedding budget is higher. By the same token a budget wedding should have too fancy of a rehearsal dinnerA less expensive wedding warrants a less expensive rehearsal dinner. And don't keep people out too late the night before the big day.
Toasts go to all the people helping with the wedding. This of course means both sets of parents. The toast comes after the main course. Other toasts, for example the best man's toast, happen at the reception.
Don't ruin a nice wedding by stepping on toes at the rehearsal dinner. Keep rehearsal dinner etiquette in mind.