I am looking at taking an extended trip in September/October. I had thought of Indonesia, for tourism and also for some surfing.
Is this the time period for the typically palm cutting/fires? If so I may need to find an alternate location.
If Your plan is to do surfing or diving. You can go to Bali and Lomok - LomokIndonesia. palm cutting/fires are located in Borneo Central & Sandal Indo Pacific, Pt. It doesn't really affect Bali and Lombok since those two islands are far away from Bali and Lombok ;-)
Mentioned in this answer:
Yes. It is "burning season" in western