As stated above, it can be done with a backup hose and the conductor on the "blind" end. This is what's done to many trains daily across the country which back into terminals/stations that may not be on the mainline. The Vermonter is one of these, backing into Springfield MA (SB) and backing out, NB.
What's the bigger question is whether or not the train will have a locomotive on either end or will utilize a cab car, due to the change of direction at Rutland. There is a wye south of Rutland on the line to Bennington but that would require some time and is in the middle of the VTR yard. At Center Rutland, where the e/w and n/s lines connect, there is only a WB to NB direct line.
Given the many crossings along the line and the "newness" of the service, it may be beneficial to utilize a locomotive on either end. The change of direction could be accomplished during the Rutland station stop.
Ideally, it would be nice to see the service also serve SW Vermont, where a reverse move wouldn't be necessary. That track still needs a bit of work to get it up to passenger train standards, and may need even more work given its recent temporary mainline status for detouring Pan-Am freight trains.