It your risk to take and only you can decide what is acceptable to you. I would advise wearing plenty of orange if you are in the field with other fellows even if they are using front stuffers. Now that all of the warnings are out of the way, lets talk hunting. At 100 yards or so you will have all of the pronghorns staring at you but the decoy should allow you to make enough movement to slip the barrel out beside the decoy and take a poke at them. They stare at the decoy like they know that something is not quite right, but they are curious to figure out what it is all about.
Some guys (the smart ones) cut a small hole in the decoy to help with the wind and to give the hunter a small window. I have not bothered to cut a hole in mine yet but one day I will. I did put a small patch of orange on my decoy - just in case.