Bring your hiking shoes because, while the State Park itself is pretty touristy (don't tour the lighthouse - not worth it), there is fantastic hiking right out of the park on the Superior Hiking Trail! Do either a loop or out-and-back and be treated to some amazing views!
Beautiful campsite, gorgeous location, and the canoe outfitters is within walking distance in case you want to shower, buy some food, supplies, or head into the BWCA! Every time I've stayed here, it's been magical. Because it's so far up north & secluded (you have to drive 30 miles down a dirt road to get there), everyone staying at the campsites are super respectful of nature.
Cascade State Park itself is pretty "meh," but, if you like hiking, it's a great place to stay! There are spur trails from the park that go past beautiful rivers and waterfalls and eventually connects to the Superior Hiking Trail. The views are spectacular in the fall!
Love this state park! The falls are within walking distance from the campsites and are beautiful! Because they're shallow and easy to access, they're a great place to take kids for a dip (as long as you watch them closely). The Gitchee Gami State Bike Trail (paved) runs through this park and goes along Lake Superior so I definitely recommend bringing some bikes! Only downside of this park is that it's always really crowded and books up fast.