Hells Gate is located about halfway between Cache Creek and Hope. You can take an enclosed tram here, down into the canyon that has been carved by the Fraser River. Once at the bottom you will find informative displays about the fish ladders that have been built here to help the salmon return home to spawn. You can see a lot of the ladders the line both sides of the canyon. The water levels vary so much in this area that there are actually 3 sets of ladders, to accomodate the fish during all seasons.
You can also buy souvenirs, snacks and delicious fudge from the shops in the canyon. (Yes, it's a bit of a tourist trap but there are reasonably priced souvenirs to be had, if you look around.)
We camped at this resort just south of Boston Bar on our way to Vancouver. There really aren't any facilities to speak of here, the laundry area is so run-down I wouldn't set foot in it (or the showers). But this is such a pretty spot, it's still well worth a visit.
Access to the resort is via an old logging road. It is steep and twisty and not for the faint of heart! We had a 25' RV and maneuvered the road with no problems. (hubby is a logging truck driver, so he has plenty of experience on these roads!)
The little lake at the resort is beautiful. It's also as cold as can be! This is a really nice quiet spot to camp with your family.