The answer to your first question is yes, you can just walk up if after November 10th. I will warn you that if you start shooting birds while people are hunting deer you will not make a lot of friends. Bird hunting can be done in STA's or on Dove or Quail quota hunts which you may need to apply for. You may also shoot birds durring small game season in some management areas. You need to go to MyFWC.com to check what animals are legal in the area durring the season you wish to hunt. I would also check which type of weapon you are allowed to use. You don't want to go to an archery only area to shoot ducks.