I contacted REACT back in the late 60's, early 70's, a few times. I was attempting to find some representation of them in S.E. Michigan. The people I spoke with seemed a little weird. They sounded like they were more interested in donations, marketing, and lots of bureaucracy.
They were no help at all. I even inquired as to what it would take to start a group in my area, and they were not interested at all.
The individuals I spoke with definitely had an air about them. I think they thought they were the Homeland Security of that time. I was not impressed with them.
Here's some info and history regarding REACT:
https://en.wikipedia.org/wiki/Radio_Emergency_Associated_Communication_Teams