Love this idea! I would have more than one glow stick on hand in case one doesn't put out enough glow. I would also put the glow sticks in sealed plastic baggies for safety in case they opened up. This site has several good ideas for Halloween.
Casey: I potentially like the greenery/ twinkle lights to dress up the poles in the barn. The pillar uprights at the Tithe Barn in great Fosters, decorated with ivy and fairy lights. From wedding reception at Great Fosters