The trick on small engine issues....run the 4-strokes out of gas before storing.
For the two-stokes, either buy some non-alcohol premix from the dealer, or go to the airport and get some avgas, and make up your own.
Of course you already knew that.
Yep...I empty all my tanks (run them out) before the winter.
What I have found is great is SeaFoam additive....that stuff works great. I bought a whole case of it..