The wikia entry for Resource Extraction Sites focuses mainly on ship spawn rates across sites of different intensity levels.
Do RES's affect anything other than ship spawn rates?
If I'm not concerned with bounties, can I land anywhere in the rings and still be just as successful at mining? Or does proximity to an RES affect things like asteroid composition (or the chances of finding certain metals/minerals)?
If proximity does have an effect, what are the distances involved?
There is a mining yield bonus of 100% (double yields) when you are within 20km of a RES site. So if you are well-armed, it might be worthwhile to endure the constant stream of scans and attacks that you'll get.