Yes, I have my trail cameras out right now and have had them out for about a month. Not only for scouting purposes but more as a second hobby as well. You will be surpised what you capture on a trail camera at the places you turkey hunt. I have gotten pictures of a bobcat, porcupine, a fellow hunter (scouting), and hundreds of pictures of the bird that we all love to hunt. They are on private land and so I am not really concerned about one coming up missing as sometimes I even have a hard time relocating them after a couple of weeks. I would recommend putting them out just out of pure enjoyment. I would also recommend getting 2 SD cards for each camera, that way you can just swap out the cards when you go to check your camera. I think that you will really enjoy the pictures that you get. Turkeys being turkeys though there is no telling if they will be within the vicinity of your trail cam come opening morning. Good luck.
After reading retranger's post I have another tip. If your camera does not have a viewer on it you can take a digital camera with you if it has the SD slot and view your pictures that way; or even a laptop if you want to pack it in.