Now that 'we' are 30 years old, we get to qualify for the annual 'Ipswich to Felixstowe' classic car run. This is East Anglia's premier classic car run and always starts off the season on the first Sunday of May. Go to
http://www.ipswichtransportmuseum.co.uk/events.htm for an entry form. It is about 12 miles starting at 'Christchurch Park' in the centre of Ipswich and finishing on the 'prom' at Felixstowe. I (and my daughter) did the run as a 'special event' with a couple of the C5s belonging to the museum a few years ago and found it to be 'easy'. There is a bit of a hill at the very start, but after that it's all on the flat, with cycle lanes (on road) most of the way. If the weather is nice there will be hundreds of people lining the route, and many thousands on the prom!