Any particular reason why you want to moor near these places? If it's a question of schedule, then I think it's wise to be a bit more flexible when cruising the Nene, and one or two diversions on the Middle Level might also be rewarding. Beware the Imray Guides - they show moorings where there are none, and vice versa. I have moored at the following (ones marked * were a bit improvised) :
Cogenhoe,Irthlingborough, Denford, Thrapston, Titchmarsh, Wadenhoe, Oundle Boat Club, Ashton, Fotheringhay (charge),Warmington, Elton, Wansford Bridge*, Wansford Station, Alwalton Lock, Ferry Meadows, Peterborough, Stanground, Ashline Lock, Floods Ferry (charge), Benwick*, Ramsey Forty Foot*, Ramsey, March, Upwell*, Outwell, Salter's Lode.
As I said, if you stick to 6 hour days and head stright for Ely, (however good that is, and it is!), you'll miss a lot.
Mac
Edited to add Benwick, where I believe proper mooring has now been provided. Anyone confirm this?