Thanks so much everyone! @SJ565 The hotel is a great suggestion! I just had a look and there is one not far from the venue that is pretty affordable, so I'm thinking I might just do that. That way, I can drive up after ET, go to the ceremony and afternoon tea bit (and maybe some of the reception) and then just head off when I'm ready without worrying about another long drive and late night. I think I will also have a chat to the bride about my situation just as a heads up that I might need to head off early.
@BlondeinBrisvegas I cracked up laughing at your comment! I have heard the sex before and after transfer thing before, but tell me honestly - how to people manage it with a vag full of crinone? Is it just me who is totally grossed out by that stuff?!
Thanks again so much ladies. I'm feeling much better now I have a kind of plan