This series was placed by myself and Hatless Gent during a canoe trip down the Blackwater River on a training weekend we were running for a group of Scouts who are heading to Canada in July 2014 for a canoe trip.
No special significance for the locations, I just chose places as I remembered and also that looked suitable.
The series were placed by a canoe, and this is the recommended mode of transport as some of the lcoations are high up out of the water and standing in a kayak may lead to an unplanned swim.
They are also in the shallows, so a powered craft is also unsuitable.
No hints, other than the caches are of a coloured 'bison type' container and if you are close, they will be obvious.