Marco Island, FL's night sky, measured from orbit
Satellite radiance puts Marco Island in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. That's brighter than 30.1% of the 3,206 US cities in this dataset.
Note the source: a satellite reading of upward light, not a visual Bortle scale reading. The two measure related but different things.
Where to go for a darker sky near Marco Island
North Port, FL, about 84 miles away as the crow flies, measures in the rural band, one step darker than Marco Island. Actual driving distance will run longer than that straight-line figure.
North Port, FL is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Marco Island compares nationally
About 16,554 people live in Marco Island, FL, sized enough to appear in this dataset of 3,206 incorporated US cities. Marco Island places 960 of 3,206 cities in this dataset's darkest-to-brightest order.