nydepot,
Greg pretty much hit the nail on the head! Eastbound 394 usually arrives in Island Pond between 1830 and 2030 and departs east shortly after a crew change. Most, but not all, nights they switch the lumber transload there. Westbound 393 returns in the middle of the night and heads west between 0730 and 0830. Currently, running most Monday, Tuesday, Thursday, and Friday nights, so the eastbound arrives that evening and the westbound departs the following morning. There have been quite a few Wednesday night extras this winter.
Best,
Fritz