most recommended...
not just to keep the dangling legs warm in these waters, but also to protect your legs. i was toob fishing with a buddy in sandy eggo bay and since the water's warm, he had no waders. consequently, when the tide carried in some icky yucky algae-like thingy, his legs were covered in slime, and he was scratching crazy when we got back to shore. he's fine after a trip to the medics.
point is, one never knows what the water will carry with it, so it's best to have waders. just my 2 cents...