others will know more. There is Sunnyside Campground at the east end of Foster Lake. Good facility with a nice boat ramp and fish cleaning station. It is mostly an out in the open facility. Not dark and dank. Foster is about 5 miles shy of Green Peter. I have no idea what the rates are.
Green Peter has free pull off the road camping as you approach the lake. I'd say about 7 spots or so. At some of those spots you'll need to drive to the lake but at most a mile. Iffy camping..to close to the road and a bit aggressive. Bring a dog or other. Your wife ain't gonna like it. Thistle Boat Ramp is just around the corner from those spots and when water is up, easy to launch. If not, then you'll need to pull down the same ramp and traverse a hundred yards across a clay road then down and paved ramp. Easy launch either way. Check this site
http://www.coastangler.com/kokanee/ramp.htmlbefore you go. Water goes up or down often but when it does it's only by a foot or less a day
If you continue pass the Thistle entrance and drive a few more miles You'll drive over a bridge and see a few more pull outs to camp. A 1/2 mile further you'll see the entrance to Wittcomb Ramp and campsite. Water needs to be UP to use that ramp. I'm not sure what the level needs to be but if i remember correctly it's 975 or so.
I've never camped or see the campsite there. I think it's a more common camping area. Someone?