Go up Chilliwack lake road ,There is forestry camps up there,basic but more outdoor than prov. camps, silver creek road near hope,golden ears, or go hwy 7 past mission and ask locals ,lots of cool spots..
It's Jones lake. Fairly close and really really nice. Don't let the pit toilets scare you they are actually nice clean out houses. Little bit tough on the vehicles to get up there but worth the trip.
Go up towards Chilliwack lake, park at the entrance to Greendrop lake and hike in for about 3k - if you hike another 7 you get to an even better spot. nobody is ever there and there is no better spot in southern bc.
21 mile upper squamish cross the bridge after you go through the interfor gate were the pavement ends drive the it's the first bridge turn left and there is a pay sites but go 1km down from that and you can find the ultimate camp site right at the river for free