Here's how to do it. If you can be bothered. It gives "visibility" - it costs a day so the pio-sneers see you - and you can stay an elder and be a hypocrite like I was before I finally had the balls to resign. I'm still a hypocrite because I still go to keep family happy but not as big a one as I used to be because I bother no-one anymore.
Go out as normal - 3 times a month on a Sat or a Sun. But there are five weekends so count 5 times (if I remember correctly) you normally scrape an hour but as you "go on calls before and after" you count 3hrs a time. So that = 15
Take one day off and work with the pioneers. One group am and another pm do 3 hours total and count 8 (those coffee stops all mount up don't they?)
Witness during your lunchbreak - you work 20 days a month and count 30 minutes a day (put a barely visible tract on your desk or on your dashboard while you sleep in your car) = 10
33 hours - simples!
"Theocratic warfare" at it's best!