I decided what to do for our tables... brown table runners, a low-ish cake stand/cake plateau covered in a lightweight fabric. Not sure if we'll do lace or what, but it'll drape over the stand and bunch on the table.
I was thinking of putting granny smith apples on it, with a taller candle in the middle, and small votives and ivory & pink flower blooms around it.
My sister said that apples are too fall-ish... so I need a few more ideas of what to put on it.
Our colors are brown, greens and pinks. Our "theme" is more rustic-y and garden-like (but not over the top on flowers) and I'd be down for incorporating a modern and refreshing flair.