The bream should be showing by then down kimmeridge(if not there will still be a few species about) but id suggest launching at one of the safer slips in Weymouth / Portland, its only a short hop back across the bay
Definitely not the method of hook removal i used in Alderney last year after emerging from the tent for a late night pee to locate a very poorrly placed set of feathers!
Cant copy and paste the link but the report is easy to find via google- looks like the unddulates are restricted to smallish local populations within their range so once they are gone from an area its unlikely they would re populate it,