I did that about 16 years ago from Jasper to Prince Rupert.
The train was a 4 car set loco hauled I think, the rear coach had a downstairs that was like a lounge car and a small dome upstairs where you could sit and set a slightly better view.
I was booked in what was called Totem class and that included light meals and wine with the evening meal, the seating was no different to the regular class of service, but was still comfortable, try not to get a seat too near the front as there was a small galley there and the window view was a bit smaller, but when not eating I went into the rear car dome as mentioned.
I think it was May or June when I did the trip and it was not too busy, I can not remember what hotels I stayed in Prince George or Prince Rupert, but they were only a short take ride from the Stations. I booked it all with Travel 2 / 4 and it was fine.
Lovey train journey and scenery, if the train crew saw anything of interest they stopped the train and made an announcement. One Man got on in the middle of nowhere just by waving his arm as the train approached.
The service was called the Skeena, well worth doing. Canada and the Canadian people are lovely.
