The 26th will probably be your best bet. Trains don't always run on fridays and saturdays. Lately the whole line has been covered by UT1. This train comes south from utica and goes to chenango Forks or Binghamton and returns north. IT NOT CONSISTANT. Keep a scanner handy tuned to 161.295 and 160.620. Form "D"s on the UT side are given as "MPU" "U" for Utica LineNorwich is MPU 232-234. MP 233 is just north of the passenger station. There are many good spots at most of all the RR crossings Topp's Supermarket parking lot is across from the old freight house and is very wide open. This is the main crossing in town, East Main St. The firehouse there is under renovation and is rather unsightly at the moment, but is an interesting building. Last Thursday the train tied down in Sherburne, about 12 miles north of Norwich. They then must have went to Bigo in wee morning hours because by 10:30am friday they were position to go north from Sherburne. GP20s have been the regular power, but anything can show up to get to the Utica Shops.
Good Luck, your gonna need it.