I have found nothing better than Cabelas MT50 Gore tex rain suits. Both the pants or bibs and jacket can be stuffed into its own pocket for easy packing. The suit has taken a beating from my turkey hunting to upland bird hunting to waterfowl hunting and even deer hunting. The pants and bibs have held up very well in the briars and brush.
Most times on cold upland hunts I wear the pants and a pair of longjohns and that is all I need in the wet or snowy grass or bursh.
I have also worn this during all my dog judging atctivites as rain does not stop us from carrying on.
JW