Blood relative Ft. Bliss

My son is active duty, Fort Bliss. The rv park states immediate blood relative may use the rv park. My question is, is this true for all military rv parks? If so, being stationed at Ft. Bliss, how does reservations and check in happen at other parks? Thank you in advance for any information you can offer.
With my highest respect for all military personnel.
J. Hand

Many military campgrounds (not all) allow "sponsored guests". This means your son can sponsor you to stay at the campground. However, your son needs to be present to sign you in for base access, and to sign you in to the campground. While this probably isn't a problem at Fort Bliss when your son is stationed there, it would be a problem at other locations, unless your son is also traveling with you.

Fort Bliss is a bit unique, as it's the only location that specifically states "blood relatives" for guests. Other locations that allow guests aren't that specific.