We did the (Lincoln) Polar Express two years ago and it was truly magical. Light sparkly snow falling as we arrived at the North Pole, passers-by waving at us as the train chugged by, lanterns glowing...absolutely lovely. It was the first time we've ever done it.
We got there hours and hours early to poke around and see the area and stumbled across North Woodstock (about two miles down the road from the PE parking lot). A lovely little town! We ate at the Woodstock Inn/Station/Brewery (I'm sure you can google it) - lots of fun, very good food, and a great kids menu. Steps away from there were a candy store and a real old-fashioned general store. Fascinating for all of us! But, get back to the PE gift shop/loading area early, early, early (an hour isn't too early - and the kids changed into their pjs in the car as we passed it in the lot as we headed back into the giftshop/waiting room) to get in front of "your" loading door - depending upon your ticket level - to get in line to board. The gift shop/waiting area gets totally jam-packed.
Have a terrific time! Hope this info helps and feel free to ask any other questions...