I never tried the westbound out of 52 crossing!
RE: trail west of 73...when Igor had his meet here, it was, I swear, more pronounced, but yes is being reclaimed. Last year I scratched the ground with my foot near the Maria-sized entrance.
The trail bisecting 61/73 is HUGE in the woods. Not sure why it doesn't have a noticeable exit anywhere, will have to check that out some time. I tended to do 73 - 61 via the right side line, which has a nice ridge, but I also had to check the other 50 small depressions, so I didn't realize how different it was from the left.
Both times I went to 67 I did so from the east side of the marsh, which was dumb because the west side is glorious.