Melissa, you asked if anyone has ever "collected" camp songs. Your mention of "floating down the Delaware chewing on her underwear" led me to Google up this (click). I didn't know the Delaware/underwear song, but I knew most of the other songs on the page. There are tens of thousands of camp song pages available. One of the most impressive is the Prairie Home Companion Camp Song Songbook. You'll find many more of that ilk in our Naughty Kids' Greatest Hits threads.
Now, to my mind, the Delaware/underwear songs are the real camp songs, and published songs like "Barges" are of secondary interest. Still, "Barges" intrigues me because we haven't been able to figure out where it came form originally. In general, though, there's a lack of spontaneity and creativity in the songs in "official" songbooks of camps and camping organizations.
As for "collecting" camp songs, that question goes unanswered.