The key to finding the Cascade River Road and Marble Creek Campground is to turn onto this bridge at the "bend" in the town of Marblemount:

The Cascade River (below left) lives up to its name, but Marble Creek (below right) also tumbles out of the North Cascades:

The best campsites are 1-12, all of which are either riverfront or river view. They are pictured below in order left to right:

A peek of the Cascade River behind site 6; then resuming with sites 7-12:

Here is an additional shot of Site 12:

The Day Use Area provides some space between the best camping sites:

The Cascade River (not so much Marble Creek) is the real gem of the Park: