We shake ours in a building and leave them set in the dark for a couple of days to minimize drifting. We don't direct release the queens but use gumdrops or candy to let them out. Pull the cans give them a spray of light syrup and shake them into box.
Dunking a package of bees in a 5 gal. bucket of water is easier said than done. Don't ask me how I know but I have heard of that route before.