Jim, I do not clip the wing nor mark my queens. I am constantly monitoring for swarm cells which I rarely find with my breeders because I always provide space for the queen to lay.
Due to winter snow levels, all of my hives are on 18 inch stands. If a clipped queen try's to swarm, she falls off the entrance and gets lost in the grass. I would rather the queen swarm than to be lost flightless in the grass.