Waterloo-Rustic Cabins offers eight rustic cabin options throughout Waterloo Recreation Area, with several located near Mill Lake including the accessible Mill B-7 cabin that sleeps 10 people.

These no-frills cabins feature outdoor grills, fire circles, and vault toilets, with water available from hand pumps (though Southfork cabin's water is seasonal).

The cabins provide a rustic base for accessing the recreation area's 11 inland lakes for fishing and paddling, though guests must bring their own bedding, cooking devices, and dishes.