I am trying to remember, but as I recall, the deceased is dressed nicely, but not all in white as you would in the temple, but the temple ceremonial clothes are placed on top of the non-white clothes. So, it's not required that the dressing of the body exactly match the temple experience. Also, there are not special rites to the dead as there are in other religions. There is a dedicatory prayer given to the grave site, but that is no different than a father dedicating or sanctifying a home, asking a special blessing on the space.
But I think it is an important remembrance and I know it's a very sacred time as the act of dressing the body is given to family and not to the funeral director. I also think unless you are excommunicated, you are still entitled to the rights (and rites) of temple clothing. You are still encouraged to wear garments even when fellowshipped.