For the carb, I’d remove it, disassemble it, clean it and put it back together again with the same seals, gaskets and diaphragm. At the start of next year, pull it apart again. This time during assembly, use a new needle and seat, and a new gasket kit.
If your engine is going to spend time over the winter where it’s going to below freezing, make sure ALL the water has been drained. Even if you’ve pulled the hoses off, there could be water still around the cylinder.
I have always preferred to drain the water and fill with a 50/50 mixture of green antifreeze. This ensure all water is addressed and it also adds anti-rust/ corrosion. In the spring you drain the anti-freeze and save for next year. This is how I winterize my boat as well.