Smokeandsteam
Working Class First
As for 'being around for longer and more consistently', if you want credibility that's massively important. I've seen community activism come and go around here, the last immediately local burst rather foundered when half the group went off to live elsewhere . I felt old and cynical when they suddenly started buzzing around everything- tbh it felt a bit like with the Mormon missionaries that show up every now and then to bring the Word to us vulnerable natives, to save us from our ignorance because we're obviously blank canvasses crying out for our betters to dig us out of our mire- and then they left a year or two later.
Churn is inevitable in any community or workplace.
IME, the key is active engagement. If you have 100 people prepared to help for 30 minutes a week that's better than 10 self appointed leaders going full tilt until they move out/burn out. Speading the work does not ease the burden on the core but it does spread the work and it can develop new key players over time.
The key to active engagement is a) to prioritise active engagement up front and from the start and not after 6 months. The work is for the community but it has to be by the community b) to ensure any action genuinely reflects the concerns of the community by listening to it. This might mean by the way that the priority issues are different to the priorities you have c) to accept the community as you find it and not how you'd like it to be. Both in terms of confidence and experience and also ideas.