Hi Alex - can't help with your request but best of luck on the day.
Nowt wrong with choppering into weddings - just needs to be done properly - and preferably, if as a 'favour', with a pilot you do not know so they will not be emotionally involved on the day if weather turns crud etc.
Just make sure you have a realistic back-up plan.
Done plenty of wedding flights but only through an AOC and with ground crew already in-situ to restrain the drunken well-intentioned wellwishers!
Nice pics by the way - looks like you're good at 'blagging' lifts - keep up the good work!