Well, it was DH's idea to get married there, since we live here and so my Dad (who's a widower) could give me away in our home town.
We told everyone we'd love them to come, but didn't expect any of them to come.
Once we knew people were coming...
We rented one house for our friends.
We rented another house for DH's parents and their friends.
We helped PILs book their flights to get best deals, good sop-overs, etc.
We specified strictly no gifts.
We had an open bar at the wedding, since we didn't want people putting their hands in their pockets after flying all that way.
We spent the first week of our honeymoon in a hired house by the beach with everyone who came.
In the end, nearly 30 people travelled to NZ for it - they had the holiday of the lifetime, as it was a massive gang of old friends, plus PILs, DH's aunts and uncles, PILs friends who are all great craic. Everyone still talks about it regularly, and the very last thing it did was alienate anyone.
You have to be so careful when you have a relationship with someone from the other side of the world - either one or the other's parents are going to miss out on an awful lot - and rubbing salt into the wound is pretty cruel in my book.
Good luck with your plans - I really would urge you to put yourself in DH's family's shoes - is your day really so important that your principles matter more than a life-long relationship with the people who raised your OH (and turned him into the person he is today)?