You can get as many opinions on what is best vegetation at the dam as there are forum members. Not that this is all bad, but it can be hard to narrow it down. In my book, your NRCS guy and/or regional state biologist would be best to consult for your specific geography. My point about doing it asap after the equipment leaves is the one to make particular note about. At that point, the top soil is still very loose and there might even be track marks from the dozer to help hold some seed. Have your seed, fertilizers, and mulch/straw mats ready in advance of their departure and allocate the time to do it promptly. Theo has a great idea with renting the straw chopper to mulch. He will kick in his thoughts.