I agree. Time banking is quite versatile and can cope with things with room bookings. It grew out of a non-tech approach (very dimilar to LETS), so has much more of that kind of feel. Pre-digital, records were kept in a ledger and the (voluntary) co-ordinator knew everyone personally.
I joined (that's an olden word for onboarding) OLIO, but I've not used it. I have thought about putting a little free kiosk at the end of the drive.