Speaking of hiding in an asteroid belt: How big and how far apart are the objects in Saturn's rings? I can't find a discussion of it except for an oblique mention in Wikipedia's article that they can get up to 2km in size.
Apparently observations of the "F ring" are consistent with particles ranging from microns to centimeters [2]:
"Comparison of optical depth profiles across the F Ring... indicates that centimeter-sized particles are the dominant source of opacity in a core ∼ 1km wide, while the micrometer-sized dust dominates in a much wider “envelope” that extends inward from the core."
The "E ring" seems to be composed predominantly of micron-sized grains, and is presumed to be fed by dust coming from Enceladus [3] [4].
I am not an astroplatentary scientist so I had to look up a map of Saturn's rings [5], apparently the E ring is very diffuse, and F is on the outside of the visible bands.
[1] - https://en.wikipedia.org/wiki/Rings_of_Saturn#C_Ring
[2] - http://www.sciencedirect.com/science/article/pii/00191035929...
[3] - http://www.sciencedirect.com/science/article/pii/00191035929...
[4] - http://www.sciencemag.org/content/311/5766/1416.short
[5] - https://en.wikipedia.org/wiki/Rings_of_Saturn#/media/File:Sa...