I dunno, I don't like risking it, personally. If you remember, Lacrystol lost her ENTIRE FLOCK when they flew the coop two years ago and she's still trying to build up her numbers! And I've even seen low-quality or perhaps hybrid calls mixed in with wild mallards around spring when the migrations come home, the poor things. They're about as equipped to handle the wilderness as I am. Which is to say, not at all. Besides, SQ calls aren't cheap. If even one flies off, that's a net loss of up to $200!
To the OP: What's your setup like? I know clipping is an automatic DQ for show birds (which if you ask me is a dumb rule, the safety of the birds should be paramount) but do they free range or are they in an enclosed run? If the latter, perhaps you could invest in some mosquito netting to canopy the area so they can't fly off? Could be great for discouraging predatory birds, too.