I also use the harness. The one I have is made by Crooked Horn Outfitters. Like others have said, it holds snuggly to the chest and does not get in the way.
Here is one made by cabelas.
http://www.cabelas.com/cabelas/en/templates/pod/horizontal-pod.jsp?_DARGS=/cabelas/en/common/catalog/pod-link.jsp_A&_DAV=MainCatcat602006-cat601627&rid=&indexId=cat601627&navAc tion=push&masterpathid=&navCount=1&par entType=index&parentId=cat601627&id=002766 6