Bait wise - start adding it now to the fishmeals. slowly change the ratio. start with 20% and gradually get higher 40, 60, 80%. Either go fully on to the winter bait or personally I like to keep at least 10-15% fishmeal. They'll still eat them. Also I would recommend the baileys over the bait, I have used it for a good few years now whenever im using nut or birdfood based baits. It'll work all year round. Buy the cheap stuff from Aldi or Lidl, it works the same. Also great in coffee on a winters day!
Tactics - remember the fish wont be slowing down anytime soon, the weather isnt cold enough yet. Normally looking at late october/early november when they start really slowing down. All depends on the weather, we had a mild winter last year and they never really stopped for long. They'll be looking to pack on weight before winter so heavy baiting could pay off at the moment.
Gear - The gas sleeves are actually worse, they'll keep the gas cold! I normally take mine out and tuck it at the bottom of my sleeping bag overnight. It's usually warm enough to work properly come morning. I also would say a small hot water bottle is essential! it'll keep you warm for ages and handy for cold feet when tucked in the bottom of a sleeping bag!
Clothing - plenty of socks, changing in to dry socks has a big effect on your body temp and mentally too. Feet sweat in the heavy boots and no matter how good the socks are meant to be at wicking away moisture they'll inevitably be damp to some degree. Use the layering system to keep warm. It really helps if you have to barrow to swims and when setting up. As soon as you sweat youll be cold and its hard to keep warm.