The normal stopover point is Kamloops, here are a couple of alternatives:

About 40 minutes North of Kamloops is the Sun Peaks ski resort area. It is a bit of a detour but it allows you to stop in somewhere other than a roadside motel.

http://www.sunpeaksresort.com/

If you want to get most of the driving done the first day, you may want to stay at Three Valley Gap, which is about 15 minutes west of Revelstoke. Here you will find a 200 room inn. PLUS, Gordon Bell has brought over 25 historic buildings from around BC and has re-assembled them as his own "Ghost Town." The man is a huge train buff restoring many old rail cars to be housed in the covered roundhouse he is building.

Many of the buildings have been bought contents and all and are furnished with antique china and linens. Quite the museum for a private endeavour.

http://www.3valley.com/


Note that on your way up to the Chateau you will pass a cordoned off parking area. Hopefully you will get a chance to see the Grizzly bear (safely from your car, of course) that is wandering that area this summer.


Have a wonderful trip.