I share your concerns about time and people!
Only this Sunday's walk is with the Otway Ranges group (I'm only taking XA and Nikky the digi). All other weekends are my own walks on Trans-Otway Waterfall Walk routes (e.g. AB & Staircase Falls, Wild Dog Falls...). They only walk once a month (first Sunday). I think even that is too much for them sometimes...(!)