For great kayaking drop your kayaks in the river at the Ipswich town dock. From there head left. Within 1/2 an hour (depending on the tide) you'll be at the mouth of Fox Creek (on your right, 200 yards before the entrance to the ocean). Up Fox Creek as far as your kayaks will go you'll come to a bridge, which opens into the Essex River. Make sure you are paying attention to the tides..the creek gets very shallow at low tide (but typically passable with a kayak or canoe).