The campground is located in Maroon creek road. Take the first exit (right exit on the roundabout if you are entering from Glenwood Springs). This is the second site after the forest services entrance. If you pay when you arrive you pay $15 for camping and $5 for entrance fee/night. We stayed for 3 nights and paid $30($15+3*$5), you can also reserve the site by calling the FS number. If you book it through online booking be sure to select 3/4 day entrance and one day camping. No site have access to electricity/individual restrooms. A common restroom is available which is close by (100ft). The campsite is very close to river and you can hear it at night. Maroon Bells is 6/7 miles away from here and you can park near the bells and use trail nearby (1 mile/3.6 mile) to go close to the lake and mountain. best time to visit the bells is morning 5am-7am and 4:45pm and till the light last.
Overall the experience was nice.
Other sites are Silver Bar, Maroon Creek, Silver Queen these are on the same route as Silver bells and will need a day pass to enter.