So you may be asking the wrong question with respect to hwy #97. My home overlooks hwy #97 in the Okanagan Valley. If you are in chilliwack you will be travelling on the number 1 to Hope. It is a busy four lane divided hwy. You have the option of hwy #7 which will be a slower paced two lane road, going through towns which will decrease in size and busyness as you move east. At Hope you can travel to Cache Creek where #1 meets #97, #1 goes east and #97 goes north. #1 will be a two lane hwy, at points winding and through the Fraser canyon, with mountainous walls. It has been a long time since I travelled that road. Most traffic use #5, the Coquhailla Hwy which is four lane, divided hwy, with a significant climb. Until last fall
it was a tollhwy and all the commercial trucks use this road. It does not go through any communitiies and speed limit is 110 km/h. approximately 65 mph. One can access communities by exiting the hwy to places like Merrit, Logan lake etc. People get on the hwy and go, go, go. The northen end is at Kamloops as people can choose to join up with #97/#1 and go west to Cache Creek. North of Cache Creek the hwy will likely be two lane, go through towns and the speed will be reduced going through each of these twons. In some places like Williams Lake the hwy will slow down to 60 kmh but the road will skirt the main retail and commercial part of the town but there will still be the "strip" that exists on every hwy near a town.
It has been a while that I have travelled north of Cache Creek but memories are still fresh.
You may wish to make a side trip from Quesnel to Barkerville near Wells, this is a gold rush town that has been maintained as a living history. In the peak of tourist time, people in period dress, will explain life in the town as people rushed to the area resulting in a push to become organized including roads being built and a justice system established.
If it is part of the plan to travel #97 one can travell Hope, #3 hwy to Penticton, Acess #97 and go north of vernon and follow #97 to Falkland and then #1 east of Kamlops and then #1/#97 goes to Cache creek but this would be a lot of travel out of your way and #3 from Hope to Princeton is winding, up and down.
Have some fun and stay safe.