Who are authorized to patronize military RV Parks, Campgrounds, and other MWR activities?

In very general terms, military ID-card holders are authorized to patronize these facilities. In some cases, DOD civilians, active or retired, may also be authorized to use MWR facilities. For more detailed and in-depth guidance, please see the documents linked below:

MWR Authorized Patronage

MWR Authorized Users Table

Info on DOD Civilian Retiree ID Cards