From the campsite there is a short hike to a viewpoint of Dillon Reservoir (linked below)! There are plenty of other local hiking options as well. Check out Hiking Project or AllTrails for more ideas. For those who are looking to get after it on a difficult trail, check out "Father Dyer Peak to Crystal Peak via Crystal Lakes Route".
There are lots of nearby mountain towns to walk around and tourist. Charles thinks Breckenridge is the cutest! Click below for a link to Keystone's gondola ride, where you can get an easy view from up high.