Hello Charles7322, Welcome to the forum.
I haven't hunted Lake Lavon, so I dont have info on that. Are you hunting public or do you have a lease? That area is in the Norrth zone, TPWD dove has a split season, Sept. 1 - Nov. 12, 2020 and again on Dec. 18, 2020 - Jan. 3, 2021
If you're a public lands hunter, the specific are you want to hunt has the open time you can hunt, including means and methods. You ca nsee these herehttp://tpwd.maps.arcgis.com/apps/webappviewer/index.html?id=c9788957300943559f7b49206e8ef153
Feel free to write back for any other questions - lots of dove hunters on here.