Im really looking forward to the first of september for the geese and doves just like you said. Im just seeing swarms of doves on the land I hunt and the geese are just starting to group up and fly again. Last year was great opening day for early goose and doves. Me and my cousin filled our limit of 5 geese in the first hour. 3 of the 10 were banded too.
We also had 9 people hunting for doves and we ended up with 95 I think it was for the first day. Those little things love the seeds in that prarie grass. Good luck w/ your hunting this season