I am quoting here from page 51 of 'Life with the Queen' by Brian Hoey, written shortly after the Charles and Camilla wedding:
"The Archbishop of Canterbury, Dr. Rowan Williams, was known to have severe reservations about the union, even though he agreed, after private consultations with The Queen, to conduct the service of blessing (or dedication) in St. George's Chapel following the civil ceremony outside the castle walls. If the Archbishop's expression was anything to go by during the service, it appeared that he had retained is doubts and was merely performing a duty demanded by the Queen of the senior cleric of the Church of England.
But contrary to Palace rumours at the time, Dr. Williams was not approached by Prince Charles to see if a church wedding could bearranged.
Charles knew that would be a non-starter and that the Archbishop would be bound to refuse, so he spared him that particular embarrassment. But Prince Charles did have a private audience with the Archbishop in the weeks leading to the ceremony and persuaded His Grace to allow a Windsor blessing in spite of his obvious misgivings.
The Archbishop was adamant that the service in St. George's Chapel should be one of repentance on the part of the bride and bridegroom, not a glorification of the marriage, which is why on the day itself, he refused to wear his full State robes and appeared instead in the simplest vestments he possessed, with the full agreement of the Queen'
I have bolded the portions which lead me to believe that all is not so rosey with the highest cleric of the CofE regarding the remarriage of the heir to the throne to his divorced ladylove. If it's up to the individual cleric, and this is how he regards the marriage and is the fellow who performs the Coronation, I dont think Charles is out of the woods yet. Perhaps if Charles does indeed ascend the throne without the Duchess, but I dont see Dr. Williams being willing to annoint Camilla as Queen, given his views. There is however no presedent for the wife of the King to not be crowned alongside. Quite a conundrum.
*closes laptop and goes to sit under desk to avoid bullets*