I wouldn't use a peep for hunting, even if there was no other option. Fortunately, there is. The No-peep has been on my bow for 3-4 years and works as advertised. It has trained me so well, that I frequently shoot for a whole evening without even looking at it. My groups are as tight as they've ever been. It's an aid that doesn't have to be used on any given shot, and I encourage all No-peep users to practice a lot without looking at it. Back when I used a string peep, my anchor was wherever it happened to fall. With the No-peep I've learned to create a solid anchoring system that is easy to repeat. In my opinion, most people using a string peep, would be clueless if the peep broke or fell out while hunting. Those using a No-peep should have no trouble hitting their mark, even if the No-peep is somehow destroyed.
My thoughts exactly. Take your time and set it up properly and you'll never go back!