A little long step but it was essentially flat. If I had managed to leave earlier, it would have been perfect.
I find real wide bike paths, without any cars ! Quite pleasant from Ferrara then the pavement deteriorates and there are roads shared with cars.
In Bondeno there is even a picnic table with everything you need : bicycles, a roof to shelter from the sun, benches and a water point ! Unfortunately, it will be the only one of its kind. And even in the villages, the only fountain I would find had marked "non-potable water" on it... a pity, you have to take precautions or stop in a café.