1.) Hotel reservations for the groom's out of town guests are the responsibility of the mother of the groom. You could coordinate hotels with the mother of bride, and maybe you will both get a better deal for each of your guests because you are reserving so many rooms.
2.) It is the responsibility of the groom's family to host and pay for the rehearsal dinner. This could be as simple as a backyard barbeque or a nice, formal sit-down dinner. Everyone who is in the ceremony is invited to the rehearsal dinner, and it is appropriate etiquette to invite the spouse or significant other of those participating, as well as the parents of the children that are in the wedding.
3.) Your arrival prior to the wedding is dictated by when you and your family are scheduled for photographs. If you are taking family photographs before, you should arrive at least thirty minutes prior to when you are scheduled to be there, just in case the photographer is ready for you early. If you won't be taking pictures until after, then you should arrive no later than an hour before the ceremony is set to begin.
4.) You should participate in the ceremony however your son and his bride have requested you too, Whether that be to light the mother's candles with the bride's mother or to be escorted to your seat by your son as he prepares to take his place at the front.
5.) Be prepared to participate in the receiving line as your guests are leaving the church or entering the reception.
