Gonna go with the Sunday as that may encourage a few locals to tag along (help with guiding/route). Sunday morning traffic in late September should be fine, and afternoon/evening traffic will be a lot better than this month.
Route will be 'flexible' depending on weather/wind direction. Hope to catch the 10am ferry from Sandbanks, so anyone coming from the west could meet us on Studland side if that's easier. Not sure if car park prices are back to winter rates by then, i'll check next time i'm down there, if not there is some free on-road parking amongst the posh houses.
Route will be plenty of ups, plenty of downs, wonderful views and probably gusty winds. Can be ss suitable if you're fit enough and the pace will be typical stw (steady with plenty of chatting). Can include scenic pub stop and/or Corfe cream tea stop and/or picnic.
Any suggestions / opinions warmly received, and can someone book some nice weather because it's grim over there when it's wet and windy.