I have done this walk quite recently adjacent to the River Alde at Snape, if it is wet please make sure you are wearing appropriate footwear
http://www.discoversuffolk.org.uk/explore-suffolk-map.aspx?hid=c4bd2538-c79c-11dd-bb1c-787156d89593#
Cycle rides through the County of Suffolk
http://www.discoversuffolk.org.uk/long-distance-cycle-routes.aspx
The Angles Way
Here at Carlton Marshes along the River Waveney
http://www.ldwa.org.uk/ldp/members/show_path.php?path_id=10