I think you may be surprised at how many friends and family make the trip without convincing.
We are getting hitched on May 21, 2005 in my hometown of Cle Elum, WA...6,000 miles away. As soon as Paul told his family, they began to ask about my small (pop: 1000) town...the nearest airport (Seattle) and lodging. ALL of his siblings and thier partners and adult children are looking for tickets as we speak, and many of his friends and cousins/other relatives, are talking about making the trip.
To make it easier, we've promised to put people up with family and friends in my hometown...that makes a huge financial difference, and may help you to get more people over. COming from WA state, the airfare is twice what it is to fly to the Eastcoast or even Chicago. So, depending on where your family and friends live, it may be even easier to afford...
Good luck...and remember, as long as you and Craig are there, it will be just fine!!!