T.W.
Try some of these links for ideas....
http://www.superweddings.com/decor/centerpieces4.html
I love the floating fruit idea plus it would be 2 good scents for your table!!! (7th photo down) You could slice the fruit and keep it in a cooler until you arrive and then add the water to the vases when you arrive, too.
http://www.usabride.com/centerpieces/index.html
http://www.favorideas.com/category/learn-about/centerpiec...
http://www.do-it-yourself-weddings.com/wedding-candle-cen...
Mirrors under any candle centerpiece really adds to the sparkle.
Good luck.
T.