B.C. Forestry Site.
(Means
NO COST, unless the Ranger comes by, then it's like $8 per night)
Bluey Lake.
Near Merrit, Great Place, usually not very populated as access road as classified as "4wd". This is not really the case, I wouldn't try a compact car, But a van or truck will have no problem.
The beauty about this place is the seclusion, I've been many times in the summer and often you'll have the whole place to yourself.
Here's a link with amenities Etc.
Blue
There's an interactive map at the bottom of the page.