Take a coffee can and put a sponge with sugar water and a few drops of anise. Once a bee finds it, while she is feeding, mark her with some paint. She will go back to the hive and tell others. Time her round trip to figure how far away the colony is. Once the sponge becomes a hot spot for bees, put the cover on it and let them sit a few minutes to make sure they fill themselves up. As best as you can, release one bee at a time and watch them as long as you can. They will initially circle to get their bearings and then go straight towards the colony. Move the the last place you spotted the bee and release another bee and watch it.
Another alternative, is if there is a lot of bees working the area, go around and catch them and put them in the can. Once you have enough, start releasing them one at a time.