Rehearsals are good; they let everyone know where they need to be during the ceremony. Why not start with the end first? Your banquet hall director, wedding coordinator or officiant will probably be running your rehearsal. Start by placing the entire bridal party, including kids, dogs, pot belly pigs, ferrets, in the places that they will end up as they await your arrival at the ceremony focal point,(could be an altar, a table, a gazebo). This way, they can all see what the ceremony tableau would be like in a perfect world; they will see the bigger picture,and their part in it. They will know what to do, and this will be relaxing. Relaxed bridal parties are wonderful things.
Your maid or matron of honor will need to be close enough to take your bouquet when you enter into the ring vows. The best man needs to be close enough to hand you or your officiant the rings, which should be in his pocket, NOT in a box; this minimized fumbling at a moment that is key to the flow of the ceremony. (I prefer to have the rings handed directly to the couple; if one of them drops a ring, it’s funny and memorable; if I drop one, it’s unprofessional.) You want everyone close enough to you and each other that the photos will get capture everyone
After that, rehearse their departure down the aisle; this is a detail that is often overlooked; the grace of the recessional is just as important as the organization of your entrance.
A nice touch that one of my clients incorporated was to have the two sets of parents accompany them as they recessed down the aisle with the bridal party. It was an intentional and heartfelt gesture of respect for their part in the lives of the bride and groom.