My round trip to work is 17 miles, which I used to cycle before the arrival of DS. Only stopped at 38 weeks (but was down to 3 days a week then). Childminder will be 1 mile from work, and DS due to start when he's 6 months. When can I start loading him on bike? Do you think I can cycle 4 days/week? Any advice on child seats? Route is mostly minor roads and cycle path (on and off road). Thanks!