***this would be outside (maybe on the deck or near a tree). A bucket of water with floating votives.*** Like the idea of guests lighting a floating candle and making a wish for the bride and groom. Placing it in a small pond or boat filled with water.
Create a simple spring mantel display by placing plant sprigs in pretty vases and bottles. Various glass bottles with one sprig of greenery or tiny flowers. especially bleeding hearts and lily's of the valley in early spring.