HI Micheal,
Have you travelled to Belize or Ambergris Caye before? I travelled to Belize a few years ago and LOVED IT!!!! So beautiful and crisp and the caribbean is spectacular...the best water I have ever seen/felt and I have visited most of the Mexican coast, Hawaii, Europe, Asia and US coastal regions. Anyway...I would NOT rule out Ambergris Caye because of the boat trip. The ride over is beautiful..turqouise waters...mangrove trees, small deserted cayes..your guests will not be dissappointed..and the anticipation on arriving at the island will be so great. If I was choosing to have my wedding in Belize I would HANDS DOWN choose Ambergis Caye!!! I hope this helps!!