Have your guests hold mason jar lanterns with led candle lights for your send off.Mason Jar Garden Lights DIY Lids Set by TheCountryBarrel I can do this for the backyard! Switch out candles for battery or LED candles.
If you were to use drift wood this would be awesome for a beach reception style thing. Very natural, but striking. Drill holes in wood, place tea lights. Beautiful outdoor table center piece for the picnic table---AROUND THE GARDEN POOL