How does the saying go? I'm going to paraphrase it a bit ... "One man's garbage is another man's cultural artifact."
Garbage left at a campsite's by campers is fair game for hauling out.
However, old dumps are more common than you may think. Most of them are back in from portages and river mouths where old logging work-camps used to be located. And there are dumps behind old leaseholder camp and cottage sites. The content of these old dumps usually falls under 'historical artifacts'. These items should be left where they are. Removal of these artifacts may only be performed by authorized staff.
The dumps' old bottles and pieces of discarded equipment would normally be considered 'collector items' for sure. However, to remove these items is considered 'theft of items of historical and cultural significance'.
So, we should limit out 'garbage-hauling-out' to genuine on-campsite, on-trail or on-water types of garbage.
Please leave the 'artifacts' to archeological students or staff working for the park. There's nothing wrong with examining these items, photographing them, precisely identifying their locations and sharing that info with the park office. However, we shouldn't 'publicly post' their precise locations, since unscrupulous people could then 'pilfer' the items.
Barry Bridgeford
http://www.AlgonquinAdventures.com
http://www.ABRweb.ca .. Algonquin Backcountry Recreationalists - Caring for Algonquin's Backcountry