This review is for the park itself and the cabins, as the campground area was closed for upgrades when we stayed there while we were there in November.
This is a beautiful park, it's huge, of course the main attraction are the many waterfalls and the hike that takes you through all the falls, and even behind several of them. Heads up that dogs are not allowed on this hike, and it's a fairly long hike, so plan what you need to for your dogs. There are other hikes that dogs are allowed on, however.
In the day use area: There's a big beautiful lodge with a nice roaring fire in the cold months. A nice gift shop and store. The day use area really is beautiful and so well maintained. There is a cool open large off leash dog area, it's not fenced so be sure your dog isn't a runner. For summer months there is a swimming area too.
Cabins are nice, new-ish, comfortable but basic. They have heaters and a big porch.
Showers and flush toilets are available here too. Ok cell reception throughout the park.