This is a cool idea although I would maybe try and hang the leaves (not very high so people could still see across from them). I would place two sticks on each table and then drape these across. The hardest part would be figuring out how to secure the sticks upright.
Right before you walk down the aisle – when everyone is lined up in front and ready to go — have the flower girl hand your man a note from you. It could be something simple like, “I can’t wait to kiss you.” He certainly won’t be expecting it and his reaction will be photo worthy.