OK then you are done with cleanups around Thanksgiving, meaning the leaves have all fallen before then. And you do get snows early. If it were me. I would try to get the work lined up ahead of time, rather than at the end. If they want to wait till all the leaves have dropped that is a heck of alot more work for you to be there one time. All the leaves, they are wet at the bottom, and the weather can turn quick. Can run into freezing weather where you can't work and so on. Well you know............ I would run a small add the last weekend of September. Size up the add the First weekend of October and run it for a second weekend like that. If you get what you want by then fine. If not run it another week. Weather permitting and you have time towards the end run the smaller add like a weekend before the week you run out of work.