9am start... ?
How about Barrhead, Newton Mearns, Bonnyton Moor, Wind Farm, Fenwick, Stewarton, Lugton, Howwood, Kilmacolm, West Glen and back via Bishopton, GT, possibly Amaretto. Cafe stop Mill House in Stewarton at exactly half way...
https://www.strava.com/routes/18959557