Careful. I've had some interactions with the guys on that group. There are some good ones, but there are a lot of bad people on there too.
As a guy who does recoveries for a living (TRAA, TRPC, Wreckmaster certified), I feel as though I have a fairly good handle on the technique of recoveries. When I tried to help on a recovery and pointed out a few serious safety concerns, they blasted me online after and banned me from the group.
A lot of their trip leaders are guys with zero actual experience, and their plan of attack is usually to hook as many vehicles as they can fit in the area to the casualty and yank until something moves. There is no thought into the physics and math of a recovery, of which usually makes everything easier and much safer.
I would offer

the same thing I offered them. I'd be happy to put together a shortish (1-2 HR?) "class" type of thing. I'd come teach it every 3 months for free. I'd even be willing to put them together in different areas of the state. All we need is a place and a time. Some time explaining all the good maths, and some time pulling someones Jeep around a dirt lot is perfect.