The Owners Map
shows a single 17' in Prince George, with the next-closest Escapes being in Kitimat and Kamloops... but many owners don't put themselves on the map, and they will be the most likely to show you their trailers.
Escape Trailer Industries can provide information about owners who have volunteered to show their trailers. Again, that's not everyone, but it could include people who are not on the map.
If you go the Community item on the menu bar, then to the search, and choose the Advanced search, you can look for forum member entries with a specific location. There are currently nine members listing Prince George as their location, but only four of them have an Escape according to their profiles (one of whom is the same owner shown on the map). You can try contacting specific members via a private message or email through the forum; be prepared for some of them to be no longer active in the EscapeForum.