On #4 I did take the big trail to the west and Peter's
route says he did too; Natalia said she took a more direct route, on the east side of the larger marsh, staying below the hill.
On 11, I wasn't too efficient, but had no problem executing (10 was another story). Big trail around the green and marshes, making a C, then I took the smaller trails over the hill to save a minuscule amount of distance. At the trail junctions due south of 11 I went right, then left and attacked from just beyond the dot knoll between the digits in "11" on the
map, following the cliffs and noting the vegetation.
Just wish I could pay such close attention on all legs. :-)