We camped here in late fall last year, a few weeks before closing. Chapman is huge, 80 something sites I think. We were the only ones there! So many nice campsites to choose from. You can camp on the Frying Pan River or on Chapman Res or in the forest. The fishing was fair in the Res and we caught 2 nice browns in the river. Great views everywhere and silence except for the river and the birds made this a perfect 2 days camping.
Little Mattie is a nice, clean, more private campground. It is pretty far from the water, which is why it has a more private feel. The sites are good but not well shaded. If you want to get away from the somtimes crowded Ruedi Res day users, go to Little Mattie.
Borgan Flats has it all. Great shady tent sites plus a number of RV sites. The Crystal River flows through the campground and you can fish right from many of the sites. Near by Marble has trails for Hiking, Biking, ATV and 4X4. Dont miss Slow Grovin' for some great BBQ!