That's a heartbreaking situation. Reminds me of the last congregation I was sent to after I left Bethel; I got to love many of the people there, and at the same time I knew it couldn't last long.
But one difference is, I was heading (as slowly as possible) to a clash and Gumby is aiming at a fade... I would give priority to individual relationships where deeper conversations are possible over large gatherings, but I wouldn't recommend that to him as he might quickly sound apostate and attract the elders' attention.
One suggestion fwiw. Go for some "social" or informal meetings but quickly drop everything formal (meetings); the invite on group gatherings might not last long.