At Flatford Boats you can hire a rowing boat from 1/2 an hour up to however long you want. We have had people go out for 8 hours. So long as you are back by October we don't mind. You can row up to Dedham and park the rowing boat at a dedicated landing stage and go for a meal in the village of Dedham, stop for an ice cream or cup of tea and then have a row back allowing the gentle current to carry you back to your starting point at Flatford. Alternatively you can row up river and stop for a picnic at the many beautiful picnic spots along the way.