Open Question: How do you clean a fish thoroughly while camping?

It is family fishing week, and my friend and I were thinking about trying to catch and eat it while camping, but that's thing, it is the FIRST time we will have done either...
Fish in the region include:
-bass (I think smallmouth)
-lake trout
-black crappie
-brook trout

Source:
http://answers.yahoo.com/question/index?qid=20110703144620AAtV6rj

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