I tried a bum pack for those occasions and became annoyed when it was in front of me and tiered of moving it when it was behind (although it held all that I needed). I changed to a small chest pack, choosing this [url=http://www.bucksbags.com/fishing_bags.asp?description=4:cee9d]http://www.bucksbags.com/fishing_bags.asp?description=4[/url:cee9d]
There are similar at Bass Pro Shops. There is enough room for tackle in the front and a rain slicker or water or warm shirt in the back. Not too congested but not big or too hot either.