Yes, Barry shoots one, you can see how he modified it if you look close.
Paul Schafer used one and Dave Windauer shoots them, on his longbows no less (gasp!)
Look at this joker...bamboo shafts and an elevated rest
These are just friends that know a rest will work in the field, but I do trust them, and have personally used Bear and Hoyt rests with no issues in some pretty rough and wet terrain. I have complete confidence in them on my hunting bows in the roughest terrain or weather.
They work on easy hunts too: